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A Firefox extension that enables and manages Firefox's built-in adblock-rust engine

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Adblock-rust Manager – Firefox extension to enable the Brave ad blocker

Name: Adblock-rust Manager – Firefox extension to enable the Brave ad blocker
Availability: InStock
Author: electricant

by electricant·Apr 29, 2026·95 points·47 comments

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AI Analysis

●●SolidNiche GemShip It

Unlocks Firefox's hidden Brave-based adblocker engine that Mozilla shipped disabled by default.

Strengths

•Provides one-click toggles for ETP and guided copy-paste workflows for locked about:config prefs.
•Manages filter list syntax compatibility with uBlock Origin rulesets natively.
•Persists complex pipe-separated list configurations across browser restarts automatically.

Weaknesses

•Cannot fully automate setup due to WebExtension API restrictions on writing arbitrary prefs.
•Utility vanishes completely if Mozilla removes or re-enables the engine in future releases.

Post Description

Firefox 149 ships adblock-rust (Brave's Rust engine, MPL-2.0) completely disabled with no UI. It's controlled by two about:config prefs with no WebExtension API, so you can't touch them programmatically from a standard extension.

This extension gives it a UI: ETP toggle (via browser.privacy API, instant), filter list manager with clipboard helpers for the manual about:config steps, and 8 preset lists. You can also add your own if you so desire.