TabAnvil

Firefox tab manager extension for people with 100+ tabs. Full-page dashboard with search, sort, native tab grouping, multi-window support, and keyboard navigation. Zero dependencies.

Install

Development (temporary)

1. Open Firefox and navigate to about:debugging#/runtime/this-firefox
2. Click "Load Temporary Add-on..."
3. Select the manifest.json file from this directory

From Firefox Add-ons (coming soon)

Will be available at addons.mozilla.org once published.

Features

• Full-page dashboard -- opens in its own tab, not a cramped popup
• Virtual scrolling -- handles 500+ tabs at 60fps
• Search -- filter by title or URL, instantly
• Sort -- by position, domain, title, or last accessed
• Native tab groups -- uses Firefox's built-in tabs.group() API
• Multi-window -- see and move tabs across all browser windows
• Multi-select -- click, shift-click, ctrl-click for batch operations
• Keyboard driven -- / search, j/k navigate, x select, d close, g group

Keyboard Shortcuts

Key	Action
/	Focus search
j / k	Navigate down / up
x	Toggle select on focused tab
d	Close selected tabs (or focused tab)
g	Group selected tabs
Enter	Switch to focused tab
Esc	Clear search or deselect

Architecture

tab-anvil/
  manifest.json      # WebExtension manifest v3
  dashboard.html     # Full-page dashboard
  dashboard.js       # Main app (~600 LOC, vanilla JS)
  dashboard.css      # Firefox dark theme styles
  background.js      # Browser action handler
  icons/             # SVG extension icons

Zero frameworks, zero build steps. Load the directory as a temporary add-on and go.

Requirements

• Firefox 138+ (for tabs.group() and tabGroups API support)
• Falls back gracefully on older versions (grouping disabled, everything else works)

License

MIT