Tabber Browser Bridge by Spooky Fish
Brings your browser tabs into Tabber's Alt-Tab switcher as individual, activatable previews.
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Extension Metadata
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About this extension
Tabber Browser Bridge is a companion extension for Tabber (spookyfish.com/tabber), a Windows app that replaces Alt-Tab with a fast, visual window switcher.
This extension does nothing on its own — it only works together with the Tabber desktop app. Once both are installed, your Firefox tabs appear in Tabber's switcher as individual previews you can jump to directly, instead of being hidden behind one generic "Firefox" entry.
What it does:
• Sends your open tab list (titles, URLs, favicons) to the Tabber app running on your computer over a local connection — this never leaves your machine or reaches Spooky Fish's servers.
• Lets Tabber activate, close, or preview a tab you select in the switcher.
Requires the Tabber desktop app (Windows only) — see https://spookyfish.com/tabber.
This extension does nothing on its own — it only works together with the Tabber desktop app. Once both are installed, your Firefox tabs appear in Tabber's switcher as individual previews you can jump to directly, instead of being hidden behind one generic "Firefox" entry.
What it does:
• Sends your open tab list (titles, URLs, favicons) to the Tabber app running on your computer over a local connection — this never leaves your machine or reaches Spooky Fish's servers.
• Lets Tabber activate, close, or preview a tab you select in the switcher.
Requires the Tabber desktop app (Windows only) — see https://spookyfish.com/tabber.
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Permissions and data
Required permissions:
- Exchange messages with programs other than Firefox
- Access browser tabs
Optional permissions:
- Access your data for all websites
Required data collection, according to the developer:
- Browsing activity
More information
- Add-on Links
- Version
- 1.5.1
- Size
- 25.37 KB
- Last updated
- 14 days ago (Sep 15, 2026)
- Related Categories
- License
- All Rights Reserved
- Privacy Policy
- Read the privacy policy for this add-on
- Version History
- Add to collection
nativeMessaging: The extension connects to a native messaging host named com.tabber.host.firefox (installed alongside the Tabber desktop app, source not part of this submission). It sends the open tab list (titles, URLs, favicons) over stdio and receives commands to activate/close a tab. This data is never transmitted over the network — it stays entirely on the user's machine, which is why browsingActivity was declared under Data Collection Permissions rather than none.
<all_urls> host permission: Used only for chrome.tabs.captureVisibleTab(), so Tabber can show a live thumbnail of the active tab. This is requested progressively, not on install — the extension starts with basic permissions only, and the user must explicitly click "Enable live tab previews" in the extension's popup (popup.js), which calls chrome.permissions.request().
Testing without Tabber installed: Without the native host present, browser.runtime.connectNative() will fail and the extension retries with backoff (visible in the console as repeated connection attempts every ~2-10s, and a keepalive alarm every ~24s) — this is expected, not a bug. To see full functionality, Tabber's Windows trial can be installed from the link above.
Source is plain, unminified JavaScript with no build step — background.js, popup.js, and popup.html are the complete, human-readable source, shared (kept in sync) with the Chrome/Edge Web Store versions of this extension.