# Configuration Guide

**Location**: `~/.config/dumber/config.toml`
**Formats**: TOML (recommended), JSON, YAML

## Database

| Key | Type | Default | Description |
|-----|------|---------|-------------|
| `database.path` | string | `~/.local/share/dumber/dumber.db` | Database file path |

## History

| Key | Type | Default | Valid Values | Description |
|-----|------|---------|--------------|-------------|
| `history.max_entries` | int | `10000` | > 0 | Maximum number of history entries |
| `history.retention_period_days` | int | `365` | > 0 | Days to keep history (1 year) |
| `history.cleanup_interval_days` | int | `1` | > 0 | How often to run cleanup |

## Search Configuration

| Key | Type | Default | Description |
|-----|------|---------|-------------|
| `default_search_engine` | string | `"https://duckduckgo.com/?q=%s"` | Default search engine URL template (must contain `%s` placeholder) |
| `search_shortcuts` | map | See defaults | Map of shortcut aliases to URLs |

**Example:**
```toml
# Default search engine - used when no shortcut is specified
default_search_engine = "https://duckduckgo.com/?q=%s"

# Alternative search engines:
# default_search_engine = "https://www.google.com/search?q=%s"
# default_search_engine = "https://www.startpage.com/search?q=%s"
# default_search_engine = "https://search.brave.com/search?q=%s"
```

**Default shortcuts (usage: `!shortcut query`):**
```toml
# Examples:
#   !ddg golang      → DuckDuckGo search for "golang"
#   !g rust tutorial → Google search for "rust tutorial"
#   !gi cats         → Google Images search for "cats"
#   !gh opencode     → GitHub search for "opencode"
#   !yt music video  → YouTube search for "music video"

[search_shortcuts.ddg]
url = "https://duckduckgo.com/?q=%s"
description = "DuckDuckGo search"

[search_shortcuts.g]
url = "https://google.com/search?q=%s"
description = "Google Search"

[search_shortcuts.gi]
url = "https://google.com/search?tbm=isch&q=%s"
description = "Google Images"

[search_shortcuts.gh]
url = "https://github.com/search?q=%s"
description = "GitHub"

[search_shortcuts.yt]
url = "https://youtube.com/results?search_query=%s"
description = "YouTube"
```

## Dmenu / Launcher

These settings control the `dumber dmenu` CLI command for rofi/fuzzel integration.

| Key | Type | Default | Description |
|-----|------|---------|-------------|
| `dmenu.max_history_days` | int | `30` | Number of days of history to show (0 = all) |
| `dmenu.show_visit_count` | bool | `true` | Show visit counts in output |
| `dmenu.show_last_visited` | bool | `true` | Show last visited dates in output |
| `dmenu.history_prefix` | string | `"🕒"` | Prefix for history items |
| `dmenu.shortcut_prefix` | string | `"🔍"` | Prefix for shortcuts |
| `dmenu.url_prefix` | string | `"🌐"` | Prefix for URLs |
| `dmenu.date_format` | string | `"2006-01-02 15:04"` | Go time format string |
| `dmenu.sort_by_visit_count` | bool | `true` | Sort by visit count instead of recency |

**CLI Usage:**
```bash
# Pipe mode (default) - outputs history for rofi/fuzzel with favicons
dumber dmenu | rofi -dmenu -show-icons -p "Browse: " | dumber dmenu --select
dumber dmenu | fuzzel --dmenu -p "Browse: " | dumber dmenu --select

# Interactive TUI mode
dumber dmenu --interactive

# Override history days via CLI flag (show last 7 days)
dumber dmenu --days 7

# Sort by most visited instead of recency
dumber dmenu --most-visited

# Combined: most visited from last 14 days
dumber dmenu --days 14 --most-visited
```

## Omnibox

| Key | Type | Default | Valid Values | Description |
|-----|------|---------|--------------|-------------|
| `omnibox.initial_behavior` | string | `"recent"` | `recent`, `most_visited`, `none` | Initial history display behavior |
| `omnibox.most_visited_days` | int | `30` | `>= 0` | Days of history to consider when `initial_behavior = "most_visited"` (`0` = all history) |
| `omnibox.auto_open_on_new_pane` | bool | `false` | - | Automatically open the omnibox after creating a new pane |

**Example:**
```toml
[omnibox]
initial_behavior = "recent"  # Show recent history when omnibox opens
most_visited_days = 30        # Days of history used for most_visited
auto_open_on_new_pane = false

# Alternative options:
# initial_behavior = "most_visited"  # Show most visited sites
# initial_behavior = "none"          # Show no initial suggestions
```

## Logging

| Key | Type | Default | Valid Values | Description |
|-----|------|---------|--------------|-------------|
| `logging.level` | string | `"info"` | `trace`, `debug`, `info`, `warn`, `error`, `fatal` | Log level |
| `logging.format` | string | `"text"` | `text`, `json`, `console` | Log format |
| `logging.max_age` | int | `7` | `>= 0` | Days to keep logs |
| `logging.max_files` | int | `100` | `>= 0` | Session log files to keep (`0` disables count cleanup) |
| `logging.log_dir` | string | `~/.local/state/dumber/logs` | any path | Log directory |
| `logging.enable_file_log` | bool | `true` | - | Enable file logging |
| `logging.capture_console` | bool | `false` | - | Capture browser console to logs |
| `logging.capture_gtk_logs` | bool | `false` | - | Capture GTK and WebKit logs for debugging. |

## Appearance

| Key | Type | Default | Description |
|-----|------|---------|-------------|
| `appearance.sans_font` | string | `"Fira Sans"` | Sans-serif font |
| `appearance.serif_font` | string | `"Fira Sans"` | Serif font |
| `appearance.monospace_font` | string | `"Fira Code"` | Monospace font |
| `appearance.default_font_size` | int | `16` | Font size in points |
| `appearance.color_scheme` | string | `"default"` | `prefer-dark`, `prefer-light`, `default` |
| `appearance.external_theme.enabled` | bool | `false` | Enable an external palette source |
| `appearance.external_theme.provider` | string | `"noctalia"` | External provider. Only `noctalia` is supported |
| `appearance.external_theme.format` | string | `"colors-json"` | External file format: `colors-json` or `dumber-json` |
| `appearance.external_theme.path` | string | `$XDG_CONFIG_HOME/noctalia/colors.json` for `colors-json`; built-in dumber-json template path for `dumber-json` | Path to the external theme JSON file |

### Color Palettes

**Light palette:**

```toml
[appearance.light_palette]
background = "#fafafa"
surface = "#f4f4f5"
surface_variant = "#e4e4e7"
text = "#18181b"
muted = "#71717a"
accent = "#22c55e"
border = "#d4d4d8"
```

**Dark palette:**

```toml
[appearance.dark_palette]
background = "#0a0a0b"
surface = "#18181b"
surface_variant = "#27272a"
text = "#fafafa"
muted = "#a1a1aa"
accent = "#4ade80"
border = "#3f3f46"
```

### External Theme: Noctalia

Dumber can integrate with Noctalia by reading the native Noctalia palette file directly. No user template is required for the default integration.

```toml
[appearance.external_theme]
enabled = true
provider = "noctalia"
format = "colors-json" # default
# Optional. Defaults to $XDG_CONFIG_HOME/noctalia/colors.json.
path = "~/.config/noctalia/colors.json"
```

The external file overrides palette colors only. Fonts, UI scale, pane-mode colors, and other appearance settings still come from Dumber config.

#### `colors-json` contract

`colors-json` reads Noctalia's active `colors.json` palette. Example file: [`docs/examples/noctalia-colors.json`](../examples/noctalia-colors.json).

Dumber maps Noctalia roles like this:

| Noctalia key | Dumber palette field |
|--------------|----------------------|
| `mShadow` | `background` when present, otherwise `mSurface` |
| `mSurface` | `surface` |
| `mHover` | `surface_variant` when present, otherwise `mSurfaceVariant` |
| `mOnSurface` | `text` |
| `mOnSurfaceVariant` | `muted` |
| `mPrimary` | `accent` |
| `mOutline` | `border` |

Every mapped value must be a CSS-safe 6-digit hex color such as `#aabbcc`.

`mShadow` and `mHover` are optional nuance roles. When present, they are validated and used to preserve Dumber's background/surface/input contrast.

Because Noctalia's native file contains the active palette only, Dumber applies that mapped palette to both resolved light and dark palettes so the app follows the file immediately.

#### Advanced: `dumber-json` user template

`dumber-json` remains supported for an explicit Dumber-specific Noctalia user template:

```toml
[appearance.external_theme]
enabled = true
provider = "noctalia"
format = "dumber-json"
# Optional for dumber-json. Defaults to $XDG_CONFIG_HOME/dumber/noctalia-theme.json.
path = "~/.config/dumber/noctalia-theme.json"
```

The file must be JSON with root `light` and `dark` objects. Optional `source`, `name`, and `mode` metadata fields are accepted; `name` or `source` is used only as source metadata. Dumber chooses the active palette from `appearance.color_scheme` and the system color-scheme preference.

Supported palette fields are:

- `background`
- `surface`
- `surface_variant`
- `text`
- `muted`
- `accent`
- `border`

Each non-empty palette value must be a CSS-safe 6-digit hex color such as `#AABBCC`. Empty or omitted palette fields inherit from the configured Dumber palette for that mode.

Example rendered file: [`docs/examples/noctalia-dumber-theme.json`](../examples/noctalia-dumber-theme.json). Example template: [`docs/examples/noctalia-dumber-theme.template.json`](../examples/noctalia-dumber-theme.template.json).

When Noctalia rewrites the watched file, Dumber reapplies the same resolved theme path used by config reloads. A malformed or temporarily missing file keeps the last valid external palette when one exists; disabling `appearance.external_theme.enabled` clears that last-good external palette and returns to Dumber's configured palettes.

## Debug Options

| Key | Type | Default | Description |
|-----|------|---------|-------------|
| `debug.enable_devtools` | bool | `true` | Enable browser developer tools (F12, Inspect Element) |
| `engine.cef.log_file` | string | `""` | CEF runtime log path |
| `engine.cef.log_severity` | int32 | `0` | CEF log severity (`0`, `1`, `2`, `3`, `4`, `99`) |
| `engine.cef.trace_handlers` | bool | `false` | Log CEF handler dispatch details |
| `engine.cef.enable_audio_handler` | bool | `true` | Enable the experimental CEF audio handler |

## Privacy

| Key | Type | Default | Valid Values | Description |
|-----|------|---------|--------------|-------------|
| `engine.cookie_policy` | string | `"always"` | `always`, `no_third_party`, `never` | Cookie acceptance policy |
| `engine.webkit.itp_enabled` | bool | `true` | - | Enable WebKit fallback Intelligent Tracking Prevention |


## Rendering, UI Scale & Zoom

CEF is the default browser engine. WebKitGTK remains available as a fallback via `engine.type = "webkit"`; `engine.webkit.*` settings only affect that fallback engine.

| Key | Type | Default | Valid Values | Description |
|-----|------|---------|--------------|-------------|
| `engine.type` | string | `"cef"` | `cef`, `webkit` | Browser engine selection; WebKitGTK is the fallback option |
| `engine.cef.render_stack` | string | `"vulkan"` | `vulkan`, `egl` | CEF GPU render stack |
| `engine.cef.adaptive_windowless_frame_rate` | bool | `true` | - | Enable adaptive CEF OSR FPS polling when `windowless_frame_rate = 0` |
| `engine.cef.windowless_frame_rate` | int32 | `0` | `>= 0` | Explicit CEF OSR FPS cap; 0 uses adaptive mode if enabled |
| `engine.cef.windowless_frame_rate_max` | int32 | `240` | `>= 0` | Hard cap for adaptive CEF OSR FPS; 0 uses the built-in cap |
| `engine.cef.input.scroll_wheel_multiplier` | float | `1.0` | `> 0` | Mouse wheel scroll sensitivity multiplier |
| `engine.cef.input.scroll_precise_multiplier` | float | `2.5` | `> 0` | Precise/surface scroll sensitivity multiplier for touchpads and high-resolution wheels |
| `engine.cef.input.scroll_horizontal_multiplier` | float | `1.0` | `> 0` | Horizontal scroll sensitivity multiplier |
| `engine.cef.input.scroll_vertical_multiplier` | float | `1.0` | `> 0` | Vertical scroll sensitivity multiplier; combines with `scroll_precise_multiplier` for touchpads |
| `engine.cef.input.scroll_max_delta` | int32 | `0` | `>= 0` | Maximum absolute scroll delta after scaling; 0 disables clamping |
| `engine.cef.input.touchpad_navigation_enabled` | bool | `true` | - | Enable two-finger touchpad swipe back/forward navigation |
| `engine.cef.input.touchpad_navigation_min_delta` | float | `320.0` | `> 0` | Minimum accumulated horizontal swipe delta required for navigation |
| `engine.cef.input.touchpad_navigation_max_vertical_ratio` | float | `0.5` | `> 0` | Maximum vertical-to-horizontal delta ratio allowed for navigation swipes |
| `engine.webkit.gsk_renderer` | string | `"auto"` | `auto`, `opengl`, `vulkan`, `cairo` | WebKit fallback GTK renderer selection (`GSK_RENDERER`) |
| `engine.webkit.disable_dmabuf_renderer` | bool | `false` | - | Disable WebKit fallback DMA-BUF renderer |
| `engine.webkit.force_compositing_mode` | bool | `false` | - | Force WebKit fallback compositing mode (`WEBKIT_FORCE_COMPOSITING_MODE`) |
| `engine.webkit.disable_compositing_mode` | bool | `false` | - | Disable WebKit fallback compositing mode (`WEBKIT_DISABLE_COMPOSITING_MODE`) |
| `engine.webkit.disable_mipmaps` | bool | `false` | - | Disable GTK mipmaps for the WebKit fallback (`GSK_GPU_DISABLE=mipmap`) |
| `engine.webkit.prefer_gl` | bool | `false` | - | Prefer OpenGL over GLES for the WebKit fallback (`GDK_DEBUG=gl-prefer-gl`) |
| `engine.webkit.draw_compositing_indicators` | bool | `false` | - | Draw WebKit fallback compositing indicators (debug) |
| `engine.webkit.show_fps` | bool | `false` | - | Show WebKit fallback FPS counter (`WEBKIT_SHOW_FPS`) |
| `engine.webkit.sample_memory` | bool | `false` | - | Enable WebKit fallback memory sampling (`WEBKIT_SAMPLE_MEMORY`) |
| `engine.webkit.debug_frames` | bool | `false` | - | Enable GTK frame timing debug for the WebKit fallback (`GDK_DEBUG=frames`) |
| `engine.webkit.force_vsync` | bool | `false` | - | Force VSync for WebKit fallback video playback |
| `engine.webkit.gl_rendering_mode` | string | `"auto"` | `auto`, `gles2`, `gl3`, `none` | WebKit fallback GStreamer/OpenGL API selection |
| `engine.webkit.gstreamer_debug_level` | int | `0` | `0-5` | WebKit fallback GStreamer debug verbosity |
| `default_ui_scale` | float | `1.0` | `> 0` | GTK widget UI scale (1.0=100%, 2.0=200%) |
| `default_webpage_zoom` | float | `1.2` | `> 0` | Default page zoom (1.0=100%, 1.2=120%) |

`engine.cef.input.scroll_precise_multiplier` controls touchpad/high-resolution wheel scroll speed, and `engine.cef.input.scroll_vertical_multiplier` applies an additional vertical-only scale. `engine.cef.input.touchpad_navigation_max_vertical_ratio` only filters horizontal back/forward swipe recognition; it does not tune vertical scroll speed.

`engine.cef.input.touchpad_navigation_min_delta` uses raw GTK touchpad surface units for back/forward gestures. The default `320.0` matches WebKit-style commit distance to reduce accidental navigation; raise or lower it in `config.toml` to tune gesture sensitivity.

### Legacy key migration

Existing configs using older keys are migrated to the current engine shape. New configs should use the canonical keys above.

| Legacy key | Current key |
|------------|-------------|
| `privacy.cookie_policy` | `engine.cookie_policy` |
| `privacy.itp_enabled` | `engine.webkit.itp_enabled` |
| `rendering.disable_dmabuf_renderer` | `engine.webkit.disable_dmabuf_renderer` |
| `rendering.force_compositing_mode` | `engine.webkit.force_compositing_mode` |
| `rendering.disable_compositing_mode` | `engine.webkit.disable_compositing_mode` |
| `rendering.gsk_renderer` | `engine.webkit.gsk_renderer` |
| `rendering.disable_mipmaps` | `engine.webkit.disable_mipmaps` |
| `rendering.prefer_gl` | `engine.webkit.prefer_gl` |
| `rendering.draw_compositing_indicators` | `engine.webkit.draw_compositing_indicators` |
| `rendering.show_fps` | `engine.webkit.show_fps` |
| `rendering.sample_memory` | `engine.webkit.sample_memory` |
| `rendering.debug_frames` | `engine.webkit.debug_frames` |
| `media.force_vsync` | `engine.webkit.force_vsync` |
| `media.gl_rendering_mode` | `engine.webkit.gl_rendering_mode` |
| `media.gstreamer_debug_level` | `engine.webkit.gstreamer_debug_level` |
| `runtime.prefix` | `engine.webkit.prefix` |
| `performance.*` | `engine.profile`, `engine.pool_prewarm_count`, `engine.zoom_cache_size`, or matching `engine.webkit.*` custom tuning keys |
| `rendering.mode` | Dropped; no current setting |

## Workspace Configuration

### General

| Key | Type | Default | Description |
|-----|------|---------|-------------|
| `workspace.new_pane_url` | string | `"about:blank"` | URL loaded for new panes/tabs (supports `http(s)://`, `dumb://`, `file://`, `about:`) |
| `workspace.switch_to_tab_on_move` | bool | `true` | When moving a pane to another tab, automatically switch to the destination tab |

**Example:**
```toml
[workspace]
new_pane_url = "dumb://history"
```

### Pane Mode

| Key | Type | Default | Description |
|-----|------|---------|-------------|
| `workspace.pane_mode.activation_shortcut` | string | `"ctrl+p"` | Pane mode activation key |
| `workspace.pane_mode.timeout_ms` | int | `3000` | Pane mode timeout (ms) |
| `workspace.pane_mode.actions` | map | See below | Action→keys mappings |

**Default pane mode actions:**
```toml
[workspace.pane_mode.actions]
split-right = ["arrowright", "r"]
split-left = ["arrowleft", "l"]
split-up = ["arrowup", "u"]
split-down = ["arrowdown", "d"]
stack-pane = ["s"]
close-pane = ["x"]
move-pane-to-tab = ["m"]
move-pane-to-next-tab = ["M", "shift+m"]
eject-pane-to-window = ["w"]

# Consume-or-expel (niri-style) - very alpha
consume-or-expel-left = ["["]
consume-or-expel-right = ["]"]
consume-or-expel-up = ["{"]
consume-or-expel-down = ["}"]

focus-right = ["shift+arrowright", "shift+l"]
focus-left = ["shift+arrowleft", "shift+h"]
focus-up = ["shift+arrowup", "shift+k"]
focus-down = ["shift+arrowdown", "shift+j"]
confirm = ["enter"]
cancel = ["escape"]
```

> **Note:** Actions are inverted to key→action map in memory for O(1) lookup performance during navigation.

### Tab Mode

| Key | Type | Default | Description |
|-----|------|---------|-------------|
| `workspace.tab_mode.activation_shortcut` | string | `"ctrl+t"` | Tab mode activation key |
| `workspace.tab_mode.timeout_ms` | int | `3000` | Tab mode timeout (ms) |
| `workspace.tab_mode.actions` | map | See below | Action→keys mappings |

**Default tab mode actions:**
```toml
[workspace.tab_mode.actions]
new-tab = ["n", "c"]
close-tab = ["x"]
next-tab = ["l", "tab"]
previous-tab = ["h", "shift+tab"]
rename-tab = ["r"]
confirm = ["enter"]
cancel = ["escape"]
```

> **Note:** Actions are inverted to key→action map in memory for O(1) lookup performance during navigation.

### Vim Mode

| Key | Type | Default | Description |
|-----|------|---------|-------------|
| `workspace.vim_mode.activation_shortcut` | string | `"ctrl+y"` | Vim mode activation key |
| `workspace.vim_mode.timeout_ms` | int | `0` | Vim mode timeout in milliseconds (`0` disables auto-timeout) |
| `workspace.vim_mode.sequence_timeout_ms` | int | `500` | Timeout for ambiguous multi-key Vim sequences |
| `workspace.vim_mode.preload_accessibility` | bool | `false` | Pre-enable browser accessibility when a WebView is shown |
| `workspace.vim_mode.actions` | map | See below | Action→binding mappings |

**Default vim mode actions:**

```toml
[workspace.vim_mode.actions.vim-scroll-left]
keys = ["h"]
desc = "Scroll page left"

[workspace.vim_mode.actions.vim-scroll-down]
keys = ["j"]
desc = "Scroll page down"

[workspace.vim_mode.actions.vim-scroll-up]
keys = ["k"]
desc = "Scroll page up"

[workspace.vim_mode.actions.vim-scroll-right]
keys = ["l"]
desc = "Scroll page right"

[workspace.vim_mode.actions.vim-scroll-down-fast]
keys = ["shift+j"]
desc = "Scroll page down fast"

[workspace.vim_mode.actions.vim-scroll-up-fast]
keys = ["shift+k"]
desc = "Scroll page up fast"

[workspace.vim_mode.actions.focus-input]
keys = ["gi"]
desc = "Focus next page input"

[workspace.vim_mode.actions.heading-next]
keys = ["]]"]
desc = "Jump to next heading"

[workspace.vim_mode.actions.heading-prev]
keys = ["[["]
desc = "Jump to previous heading"

[workspace.vim_mode.actions.confirm]
keys = ["enter"]
desc = "Confirm action"

[workspace.vim_mode.actions.cancel]
keys = ["escape"]
desc = "Cancel/exit mode"
```

Notes:
- Vim Mode scrolls and navigates the active webpage inside the active pane only.
- `gi` focuses the next visible editable page input, starting at the first when no input is active and wrapping after the last.
- `]]` and `[[` move through visible `h1`–`h6` headings and use the current Dumber theme accent for the selected-heading outline.
- The default `timeout_ms = 0` means Vim Mode stays active until you exit it or focus moves into an editable/browser UI context. `Ctrl+Y` can still activate it when a page input is already focused.
- Arrow keys still use the browser engine's native page-navigation path while Vim Mode is active.
- `Tab` and `Shift+Tab` keep focus traversal inside the page while a page input is focused.
- Live input, heading, and page-focus navigation currently use the CEF engine path; WebKit fallback supports the Vim scroll commands while equivalent semantic navigation is pending.
- Other app-level shortcuts stay suspended until Vim Mode exits, except for the Vim Mode toggle itself.
- `workspace.styling.pane_mode_color`, `workspace.styling.transition_duration`, and `workspace.styling.mode_indicator_toaster_enabled` control the pane-local Vim Mode visuals.
- Scroll execution: CEF and WebKit both use the shared `BuildPageScrollByJS` resolver when the page is ready. Each step starts under the viewport center, walks up through ancestors that can move in the requested direction, and hands scrolling to the document when a nested container reaches its boundary. The application repeater owns held-key cadence; each engine executes one immediate scroll step per tick. Cross-origin frame contents remain best-effort. CEF may use native precision-wheel input only as a pre-frame fallback before the browser/main frame is ready.

### Resize Mode

| Key | Type | Default | Description |
|-----|------|---------|-------------|
| `workspace.resize_mode.activation_shortcut` | string | `"ctrl+n"` | Resize mode activation key |
| `workspace.resize_mode.timeout_ms` | int | `3000` | Resize mode timeout (ms) |
| `workspace.resize_mode.step_percent` | float | `5.0` | Split ratio step per keystroke (percent) |
| `workspace.resize_mode.min_pane_percent` | float | `10.0` | Minimum pane size (percent) |
| `workspace.resize_mode.actions` | map | See below | Action→keys mappings |

**Default resize mode actions:**
```toml
[workspace.resize_mode.actions]
resize-increase-left = ["h", "arrowleft"]
resize-increase-down = ["j", "arrowdown"]
resize-increase-up = ["k", "arrowup"]
resize-increase-right = ["l", "arrowright"]
resize-decrease-left = ["H"]
resize-decrease-down = ["J"]
resize-decrease-up = ["K"]
resize-decrease-right = ["L"]
resize-increase = ["+", "="]
resize-decrease = ["-"]
confirm = ["enter"]
cancel = ["escape"]
```

Notes:
- Directional actions (`resize-increase-*/resize-decrease-*`) move the split divider.
- Smart actions (`resize-increase` / `resize-decrease`) grow/shrink the active pane (best-effort) by picking a direction automatically.
- Timeout is refreshed on each resize keypress so you can keep adjusting without re-entering the mode.

### Global Shortcuts

Global shortcuts are configured under `workspace.shortcuts.actions` using the same `ActionBinding` structure as modal keybindings:

| Action | Default Keys | Description |
|--------|--------------|-------------|
| `toggle_floating_pane` | `alt+f` | Toggle the workspace floating pane (persistent session) |
| `close_pane` | `ctrl+w` | Close active pane (or release floating pane when floating is active) |
| `next_tab` | `ctrl+tab` | Switch to next tab |
| `previous_tab` | `ctrl+shift+tab` | Switch to previous tab |
| `consume_or_expel_left` | `alt+[` | Consume into left sibling stack, or expel left if stacked |
| `consume_or_expel_right` | `alt+]` | Consume into right sibling stack, or expel right if stacked |
| `consume_or_expel_up` | `alt+{` | Consume into upper sibling stack, or expel up if stacked |
| `consume_or_expel_down` | `alt+}` | Consume into lower sibling stack, or expel down if stacked |

**Example:**
```toml
[workspace.shortcuts.actions.close_pane]
  keys = ["ctrl+w"]
  desc = "Close active pane"

[workspace.shortcuts.actions.next_tab]
  keys = ["ctrl+tab", "alt+l"]
  desc = "Switch to next tab"

[workspace.shortcuts.actions.toggle_floating_pane]
  keys = ["alt+f"]
  desc = "Toggle floating pane"
```

> **Tip:** Use `dumb://config` → Keybindings tab to edit shortcuts visually.
>
> **Note:** New tab creation uses modal tab mode (Ctrl+T then n/c). This follows the Zellij-style modal keyboard interface.
>
> **Note:** Consume-or-expel is experimental and may change behavior between releases.
>
> **Warning:** Some `Alt+<key>` shortcuts may conflict with WebKit defaults, website handlers, or your desktop environment.
> If a binding does not fire, rebind it to a different key.

### Floating Pane

The floating workspace pane is a persistent overlay session: hiding it does not destroy its web content.

- Default behavior includes exactly one floating shortcut: `Alt+F` (`toggle_floating_pane`).
- URL shortcuts (for example `Alt+G`) are user-defined via `workspace.floating_pane.profiles` and are empty by default.
- `Alt+F` toggles visibility only and preserves floating state.
- `Ctrl+W` on an active floating pane closes and releases that floating session for a fresh next open.
- Floating profile keybindings support modifier combos with `ctrl`, `shift`, and `alt` (for example `ctrl+shift+y` or `ctrl+alt+m`).

| Key | Type | Default | Description |
|-----|------|---------|-------------|
| `workspace.floating_pane.width_pct` | float | `0.82` | Floating pane width as fraction of workspace width (`(0,1]`) |
| `workspace.floating_pane.height_pct` | float | `0.72` | Floating pane height as fraction of workspace height (`(0,1]`) |
| `workspace.floating_pane.profiles` | map | `{}` | Named URL profiles, each with `keys[]`, `url`, optional `desc` |

**Example:**

```toml
[workspace.shortcuts.actions.toggle_floating_pane]
keys = ["alt+f"]
desc = "Toggle floating pane"

[workspace.floating_pane]
width_pct = 0.82
height_pct = 0.72

[workspace.floating_pane.profiles]
# Empty by default. Add as many entries as needed.

[workspace.floating_pane.profiles.google]
keys = ["alt+g"]
url = "https://google.com"
desc = "Open floating pane on Google"

[workspace.floating_pane.profiles.github]
keys = ["alt+h"]
url = "https://github.com"
desc = "Open floating pane on GitHub"
```

### Browsing Context Behavior

| Key | Type | Default | Valid Values | Description |
|-----|------|---------|--------------|-------------|
| `workspace.browsing_contexts.behavior` | string | `"split"` | `split`, `stacked`, `tabbed`, `windowed` | Placement mode for script-opened browsing contexts |
| `workspace.browsing_contexts.placement` | string | `"right"` | `right`, `left`, `top`, `bottom` | Split direction when behavior is `split` |
| `workspace.browsing_contexts.open_in_new_pane` | bool | `true` | - | Allow new browsing contexts to open in the workspace |
| `workspace.browsing_contexts.follow_pane_context` | bool | `true` | - | Keep new browsing contexts aligned with the parent pane context |
| `workspace.browsing_contexts.blank_target_behavior` | string | `"stacked"` | `split`, `stacked`, `tabbed` | Placement mode for `_blank` / new-page link contexts |
| `workspace.browsing_contexts.enable_smart_detection` | bool | `true` | - | Use window properties to refine browsing-context classification |
| `workspace.browsing_contexts.oauth_auto_close` | bool | `true` | - | Auto-close OAuth browsing contexts after success |

### Workspace Styling

| Key | Type | Default | Description |
|-----|------|---------|-------------|
| `workspace.styling.border_width` | int | `1` | Active pane border width (px) - overlay |
| `workspace.styling.border_color` | string | `"@theme_selected_bg_color"` | Active pane border color |
| `workspace.styling.mode_border_width` | int | `4` | Modal mode border width (px) - applies to all modes |
| `workspace.styling.pane_mode_color` | string | `"#4A90E2"` | Pane mode color (blue); also reused for Vim mode pane-local accent, indicator, and pulse |
| `workspace.styling.tab_mode_color` | string | `"#FFA500"` | Tab mode color (orange) - used for border and toaster |
| `workspace.styling.session_mode_color` | string | `"#9B59B6"` | Session mode color (purple) - used for border and toaster |
| `workspace.styling.resize_mode_color` | string | `"#00D4AA"` | Resize mode color (teal) - used for border and toaster |
| `workspace.styling.mode_indicator_toaster_enabled` | bool | `true` | Show bottom-left mode toaster when modal modes are active; Vim Mode keeps a persistent `VIM MODE` indicator until exit or toggle off |
| `workspace.styling.transition_duration` | int | `120` | Border and pulse transition duration (ms) |

**Example:**

```toml
[workspace.styling]
border_width = 1
border_color = "@theme_selected_bg_color"
mode_border_width = 4
pane_mode_color = "#4A90E2"      # Blue for pane mode and Vim mode local accent
tab_mode_color = "#FFA500"       # Orange for tab mode
session_mode_color = "#9B59B6"   # Purple for session mode
resize_mode_color = "#00D4AA"    # Teal for resize mode
mode_indicator_toaster_enabled = true
transition_duration = 120
```

## Session

| Key | Type | Default | Description |
|-----|------|---------|-------------|
| `session.auto_restore` | bool | `false` | Automatically restore the last session on startup |
| `session.snapshot_interval_ms` | int | `5000` | Minimum interval between snapshots in milliseconds |
| `session.max_exited_sessions` | int | `50` | Maximum number of exited sessions to keep |
| `session.max_exited_session_age_days` | int | `7` | Maximum age in days for exited sessions (auto-deleted on startup) |

### Session Mode

| Key | Type | Default | Description |
|-----|------|---------|-------------|
| `session.session_mode.activation_shortcut` | string | `"ctrl+o"` | Session mode activation key |
| `session.session_mode.timeout_ms` | int | `3000` | Session mode timeout (ms) |
| `session.session_mode.actions` | map | See below | Action to keys mappings |

**Default session mode actions:**
```toml
[session.session_mode.actions]
session-manager = ["s", "w"]
confirm = ["enter"]
cancel = ["escape"]
```

**Example:**
```toml
[session]
auto_restore = false              # Don't auto-restore on startup
snapshot_interval_ms = 5000       # Save state every 5 seconds (debounced)
max_exited_sessions = 50          # Keep last 50 exited sessions
max_exited_session_age_days = 7   # Delete sessions older than 7 days on startup
```

## Media

| Key | Type | Default | Valid Values | Description |
|-----|------|---------|--------------|-------------|
| `media.hardware_decoding` | string | `"auto"` | `auto`, `force`, `disable` | Hardware video decoding mode |
| `media.prefer_av1` | bool | `false` | - | Prefer AV1 codec when available |
| `media.show_diagnostics` | bool | `false` | - | Show media diagnostics warnings at startup |

WebKit fallback GStreamer tuning is configured under `engine.webkit.force_vsync`, `engine.webkit.gl_rendering_mode`, and `engine.webkit.gstreamer_debug_level`.

**Hardware decoding modes:**
- `auto` (recommended): Hardware preferred with software fallback - fixes Twitch Error #4000
- `force`: Hardware only - fails if unavailable
- `disable`: Software only - higher CPU usage

**GPU auto-detection:**
Dumber automatically detects your GPU vendor (AMD/Intel/NVIDIA) and sets optimal VA-API driver settings:
- **AMD**: Uses `radeonsi` driver
- **Intel**: Uses `iHD` driver (modern, for Broadwell+)
- **NVIDIA**: Uses `nvidia` driver with EGL platform

**Example:**

```toml
[media]
hardware_decoding = "auto"    # HW preferred, SW fallback
prefer_av1 = false            # Let site choose codec
show_diagnostics = false      # Keep off for daily use
```

**WebKit fallback GStreamer diagnostics:**

```toml
[engine.webkit]
gstreamer_debug_level = 3
```

Set `media.show_diagnostics = false` and `engine.webkit.gstreamer_debug_level = 0` to return to normal mode.

**Diagnostics CLI:**

```bash
# Check GStreamer plugins and VA-API status
dumber doctor --media
```

## Runtime

| Key | Type | Default | Description |
|-----|------|---------|-------------|
| `engine.cef.cef_dir` | string | `""` | Optional CEF runtime directory containing `libcef.so` and resources |
| `engine.webkit.prefix` | string | `""` | Optional WebKitGTK fallback runtime prefix (e.g., `/opt/webkitgtk`) |

`engine.cef.cef_dir` overrides CEF runtime discovery. For the WebKitGTK fallback, `engine.webkit.prefix` prepends prefix-derived paths to:
- `PKG_CONFIG_PATH` (for version checks)
- `LD_LIBRARY_PATH` (for runtime library loading)
- `GI_TYPELIB_PATH` (GObject introspection)
- `XDG_DATA_DIRS` (schemas/resources)

**Example:**

```toml
[engine.cef]
cef_dir = "/opt/cef"

[engine.webkit]
prefix = "/opt/webkitgtk"
```

## Clipboard

| Key | Type | Default | Description |
|-----|------|---------|-------------|
| `clipboard.auto_copy_on_selection` | bool | `true` | Automatically copy selected text to clipboard (zellij/tmux-style) |

When enabled, selecting text in a web page immediately copies it to the clipboard with a brief toast notification. Does not apply to text selection in input fields or textareas.

**Example:**

```toml
[clipboard]
auto_copy_on_selection = true  # Enabled by default
```

## Content Filtering

| Key | Type | Default | Description |
|-----|------|---------|-------------|
| `content_filtering.enabled` | bool | `true` | Enable ad blocking |
| `content_filtering.auto_update` | bool | `true` | Automatically update filters |

Notes:
- Filter data is downloaded from `bnema/ublock-webkit-filters` GitHub releases.
- Domain whitelist is managed via the database (`content_whitelist` table), not the config file.

## Update

| Key | Type | Default | Description |
|-----|------|---------|-------------|
| `update.enable_on_startup` | bool | `true` | Check for updates when browser starts |
| `update.auto_download` | bool | `false` | Automatically download updates in background |
| `update.notify_on_new_settings` | bool | `true` | Show toast notification when new config settings are available |

**Example:**

```toml
[update]
enable_on_startup = true       # Check for updates on startup
auto_download = false          # Don't auto-download (prompt instead)
notify_on_new_settings = true  # Show toast when config migration available
```

**CLI Commands:**

```bash
# Check config status and available migrations
dumber config status

# Add missing settings with default values
dumber config migrate

# Skip confirmation prompt
dumber config migrate --yes
```

## Performance Profiles

Performance profiles tune engine resource behavior. CEF is the default engine; the `engine.webkit.*` custom fields below apply only when using the WebKitGTK fallback.

> **Note:** Performance settings are applied at browser startup. Changes require a restart to take effect.

| Key | Type | Default | Valid Values | Description |
|-----|------|---------|--------------|-------------|
| `engine.profile` | string | `"default"` | `default`, `lite`, `balanced`, `max`, `custom` | Performance profile selection |
| `engine.pool_prewarm_count` | int | `4` | `>= 0` | WebViews to pre-create at startup |
| `engine.zoom_cache_size` | int | `256` | `>= 0` | Domain zoom levels to cache |

### Profiles

| Profile | Description | Use Case |
|---------|-------------|----------|
| `default` | No tuning, uses engine defaults | Compatibility baseline, troubleshooting |
| `lite` | Reduced resource usage | Low-RAM systems (< 4GB), battery saving |
| `balanced` | Moderate tuning | General use |
| `max` | Maximum responsiveness | Heavy pages (GitHub PRs, complex SPAs), high-end systems |
| `custom` | Manual control over all settings | Advanced users who want fine-grained control |

**Example:**

```toml
[engine]
profile = "default"
pool_prewarm_count = 4
zoom_cache_size = 256
```

### WebKit fallback custom profile settings

When `engine.profile = "custom"` and `engine.type = "webkit"`, you can configure individual WebKit tuning options:

| Key | Type | Default | Description |
|-----|------|---------|-------------|
| `engine.webkit.skia_cpu_painting_threads` | int | `0` | Skia CPU rendering threads (0=unset) |
| `engine.webkit.skia_gpu_painting_threads` | int | `-1` | Skia GPU rendering threads (-1=unset, 0=disable) |
| `engine.webkit.skia_enable_cpu_rendering` | bool | `false` | Force CPU rendering |
| `engine.webkit.web_process_memory_limit_mb` | int | `0` | Web process memory limit in MB (0=unset) |
| `engine.webkit.web_process_memory_poll_interval_sec` | float | `0` | Memory check interval (0=WebKit default: 30s) |
| `engine.webkit.web_process_memory_conservative_threshold` | float | `0` | Conservative cleanup threshold (0=unset) |
| `engine.webkit.web_process_memory_strict_threshold` | float | `0` | Strict cleanup threshold (0=unset) |
| `engine.webkit.network_process_memory_limit_mb` | int | `0` | Network process memory limit in MB |
| `engine.webkit.network_process_memory_poll_interval_sec` | float | `0` | Network memory check interval |
| `engine.webkit.network_process_memory_conservative_threshold` | float | `0` | Network conservative threshold |
| `engine.webkit.network_process_memory_strict_threshold` | float | `0` | Network strict threshold |

**Custom WebKit fallback example:**

```toml
[engine]
type = "webkit"
profile = "custom"
pool_prewarm_count = 6
zoom_cache_size = 256

[engine.webkit]
skia_cpu_painting_threads = 4
skia_gpu_painting_threads = 2
web_process_memory_limit_mb = 1024
web_process_memory_conservative_threshold = 0.4
web_process_memory_strict_threshold = 0.6
```

> **Important:** Individual `engine.webkit.*` tuning fields are ignored unless `engine.profile = "custom"`.

## Downloads

| Key | Type | Default | Description |
|-----|------|---------|-------------|
| `downloads.path` | string | `""` | Download directory path (empty = `$XDG_DOWNLOAD_DIR` or `~/Downloads`) |

Downloads are saved to the configured directory with toast notifications for download started, completed, and failed events.

**Example:**
```toml
[downloads]
path = ""  # Use system default ($XDG_DOWNLOAD_DIR or ~/Downloads)

# Or specify a custom directory:
# path = "/home/user/my-downloads"
```

## Environment Variables

All config values can be overridden via environment variables with the prefix `DUMBER_`:

```bash
# Database
DUMBER_DATABASE_PATH=/custom/path/db.sqlite

# Engine/rendering (examples)
DUMBER_ENGINE_TYPE=cef
# CEF defaults to the GPU-first Vulkan DMABUF stack.
# Use EGL/OpenGL for driver compatibility:
# DUMBER_ENGINE_CEF_RENDER_STACK=egl
# WebKit fallback rendering overrides:
# DUMBER_ENGINE_WEBKIT_DISABLE_DMABUF_RENDERER=true
# DUMBER_ENGINE_WEBKIT_GSK_RENDERER=opengl
DUMBER_DEFAULT_WEBPAGE_ZOOM=1.5

# Logging
DUMBER_LOG_LEVEL=debug
DUMBER_LOG_FORMAT=json
```