Tab Stash — Firefox Extension

Quickly save tabs to a sidebar panel and come back to them later.

Features

• Save the current page via:
  • Toolbar button click
  • Keyboard shortcut (default: Ctrl+Shift+S / MacCtrl+Shift+S)
  • Right-click context menu on any page, link, or tab
• Duplicate detection: saving the same URL again updates its timestamp and flashes a badge.
• Sidebar panel shows saved items sorted latest first.
• Read / unread toggle: click the dot on any item to mark it as read or unread.
• Filter items by page title or URL in real time.
• Delete individual items.
• Export your list to a dated JSON file.
• Import a previously exported JSON file (merges by URL, preserves read status).
• Preferences accessible via the gear icon in the sidebar or the options page.

Install

From Mozilla Add-ons (recommended)

Coming soon to addons.mozilla.org

From source (temporary)

1. Download or clone this repo
2. Open Firefox and go to about:debugging
3. Click This Firefox
4. Click Load Temporary Add-on...
5. Select manifest.json

Build

No build step required — this is a plain WebExtension. To create the .xpi package:

zip -X -r tab-stash.xpi manifest.json background.js sidebar/ options/ icons/

File Structure

├── manifest.json
├── background.js
├── sidebar/
│   ├── sidebar.html
│   ├── sidebar.css
│   └── sidebar.js
├── options/
│   ├── options.html
│   ├── options.css
│   └── options.js
└── icons/
    ├── icon-16.png
    ├── icon-32.png
    └── icon-48.png

Data & Privacy

All data is stored locally in your browser using browser.storage.local. Nothing is transmitted or shared. See PRIVACY.md for details.

Data Format

Items are stored under the key readLaterItems:

[
  {
    "id": "<uuid>",
    "url": "https://example.com",
    "title": "Example Page",
    "savedAt": "2026-05-28T19:31:56.696Z",
    "read": false
  }
]