u/Far_Tailor_1126

The built-in browser inactivity APIs always felt wrong to me because they track the entire OS. If I'm using another app, my browser shouldn't lock itself.

So, I made Dario Locker. It runs a lightweight activity radar that only cares about mouse/keyboard events inside Firefox. If you switch to another app, the countdown starts.

Key features:

• Browser-Specific Inactivity Timer: Accurately locks Firefox when you're not using it, even if you're active elsewhere.
• "Zero-Trust" Core Shield: When locked, it redirects attempts to access about:addons, about:config, etc., to prevent bypass.
• Internal Log: A simple console in the popup shows when the lock was triggered.

It's 100% local, no data collection, and passed Mozilla's review with 0 warnings (no innerHTML!).

Feel free to try it out and let me know if you find any bugs.

Link: https://addons.mozilla.org/pt-BR/firefox/addon/dario-locker/