5 Underrated Firefox Extensions That Actually Respect Your Privacy

The extension ecosystem is full of tools that claim to help you while quietly sending data to third-party servers. These five actually keep data local — and the ones I've tried, I can vouch for personally.

1. Weather & Clock Dashboard

Install from AMO

Replaces your new tab with live weather, a 3-day forecast, and configurable world clocks. The privacy angle: weather data comes from Open-Meteo (no API key, no account), your coordinates never leave your browser, and the entire extension is ~500 lines of vanilla JS/CSS you can read in an afternoon.

No analytics. No telemetry. No external fonts or CDN assets. Just weather.

What I checked : Source code is MIT licensed, and AMO's review process verified no remote code execution or unnecessary permissions.

2. uBlock Origin

Install from AMO

The gold standard for content blocking. Open source (GPLv3), completely local rule evaluation — nothing about your browsing leaves your machine.…