Adblock-rust Manager – Firefox extension to enable the Brave ad blocker
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.
FL score
out of 100
Verdict
medium confidence
Competition
No competitor data yet
Trend
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A niche Firefox extension that wraps Mozilla's disabled ad-blocking engine with a UI, solving a problem only power users know exists.
The pain
The gap
Build angle
Strengths
- Solves a real technical problem for privacy-conscious users
- Leverages Mozilla's own open-source engine (MPL-2.0)
- Low competition, highly specialized niche
- Clear technical feasibility (browser.privacy API exists)
- Potential to become standard tool in privacy community
Risks
- Extremely small addressable market (power users + privacy advocates only)
- Mozilla could re-enable the feature or change APIs, killing the product
- Requires ongoing maintenance as Firefox versions evolve
- No clear monetization path for such a niche tool
- Awareness problem: users don't know they need this
- Potential trademark/brand sensitivity with Brave association
- One-time install, low retention, not a recurring engagement product
Fly Labs Method
Is the pain real, is there a gap, is it the right time, can one person build it.
Value Equation
Dream outcome and how likely it feels, against the time and effort it costs.
One-Person Business
Curiosity pull, identity fit, and a path from free value to paid for a solo creator.
Viral Frameworks
Hook strength, shareability, and how cheaply it can be tested.
Builder Lens
Evidence the problem exists, timing, defensibility, and a model that fits on a napkin.
Five lenses, one composite. How scoring works
The angle
No market research recorded for this idea yet.
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