Simple Shield Ad Blocker — pavlkon

Simple Shield is a lightweight, high-performance ad and tracker blocker built specifically for Firefox.

Instead of relying on throttled rulesets or corporate whitelist programs, Simple Shield uses a local in-memory engine to evaluate network requests while blocking over 2.6 million ad, tracker, and malware domains out of the box.

Key features:
2.6+ Million Domains: Pre-compiled against HaGeZi, OISD, StevenBlack, EasyList, and EasyPrivacy.
No "Acceptable Ads": Doesn't take money to let paid ads through - no whitelisted advertisers.
Privacy First: Zero telemetry, zero tracking, and no phoning home. Everything stays 100% local on your machine.
Smart Site Toggles: Easily pause blocking on specific sites or add custom domain filters.
100% Open Source: Distributed under the GPLv3 license.

GitHub Repository:
https://github.com/pavlkon/simple-shield