LibreShield wot Gleb Goodkovsky

LibreShield is a privacy-focused, free, and open-source content blocker for Firefox and Gecko-based browsers.

Block entire websites by domain, filter pages that contain specific words or phrases, and whitelist sites you always want to allow — all managed from a simple settings page. Everything is stored locally on your device, nothing ever leaves your browser.

Need to visit a blocked site briefly? You can request temporary timed access directly from the block page.

Features:
- Domain and keyword blocking
- Site allowlist
- Temporary timed access from the block page
- Password-protected settings
- Light and dark theme
- Export and import your settings

For full details, source code, and documentation:
https://github.com/glebgoodkovsky/libreshield