LibreGuard by LibreSearch

How it works
LibreGuard blocks ads, trackers, and malicious domains at the network layer using Chrome and Firefox's declarativeNetRequest API. Requests are intercepted before they ever leave your browser — no JavaScript injection, no slow per-request processing, no data collection.
At build time, LibreGuard compiles 300,000+ domains from trusted, community-maintained filter lists into efficient static rules that ship with the extension.
Features
- Blocks 300K+ ad, tracking, malware, phishing, and scam domains
- Network-level blocking — faster and more private than script-based blockers
- Per-site allowlist to disable blocking on specific sites
- Toolbar badge shows blocked requests per page
- Custom cosmetic filter support for hiding page elements
- Filter list auto-updates (refresh any list to get latest rules)
- No account, no telemetry, no profile — nothing leaves your device
Filter list sources
- BlockList Project (ads, tracking, malware, phishing, fraud, scam)
- EasyList + EasyPrivacy
- Peter Lowe's Ad Server List