Only three tabs. Total focus. A free, open-source browser extension that limits you to 3 tabs (adjustable) and blocks new ones once you hit the limit.
🌐 Website: https://mkalmousli.github.io/ThreeTabs/
- Tab limit of 3 by default, adjustable from 1 to 50
- Blocks new tabs and windows when the limit is reached
- Optional redirect: open the blocked link in the tab you came from
- Count across all windows or per window
- Quiet by design: no numbers on the toolbar icon. A popup shows your slots and a blocked-tabs counter
- Settings always open, even when you're over the limit
- Never closes existing tabs, no tracking. The only network request is an optional daily check of the latest GitHub release (can be turned off)
- Works on Chrome, Edge, Brave, Opera, Vivaldi and Firefox (Manifest V3)
Screenshots, promo tiles and the ad video live in store/; their sources and build scripts are in marketing/.
Get ThreeTabs on the Chrome Web Store (Chrome, Edge, Brave, Opera, Vivaldi).
Chrome / Edge / Brave: open chrome://extensions, enable Developer mode, click Load unpacked, and select the extension folder.
Firefox (121+): open about:debugging#/runtime/this-firefox, click Load Temporary Add-on…, and select extension/manifest.json.
To build a ZIP: ./scripts/package.sh (outputs dist/threetabs.zip).
tabs: count tabs and close the extra onestorage: save your settings locallyalarms: schedule the daily update check
No analytics, no tracking, no ads. Read the full Privacy Policy and Terms of Use.
ThreeTabs is free. If it helps you focus, you can support it on Ko-fi.
Semantic Versioning. See CHANGELOG.md. Pushing a vX.Y.Z tag builds and publishes a release automatically.