# Firefox Quietly Adds Brave’s Rust-Based Adblocker

**URL:** https://discuss.privacyguides.net/t/firefox-quietly-adds-brave-s-rust-based-adblocker/37412
**Category:** News
**Created:** 2026-04-24T23:01:01Z
**Posts:** 12

## Post 1 by @fria — 2026-04-24T23:01:02Z

Firefox has [bundled](https://shivankaul.com/blog/firefox-bundles-adblock-rust) [adblock-rust](https://github.com/brave/adblock-rust), Brave’s memory-safe content blocker, into Firefox in version 149, although disabled by default.

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This is a companion discussion topic for the original entry at [https://www.privacyguides.org/news/2026/04/24/firefox-quietly-adds-braves-rust-based-adblocker](https://www.privacyguides.org/news/2026/04/24/firefox-quietly-adds-braves-rust-based-adblocker)

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## Post 2 by @polyester_apricot650 — 2026-04-24T23:37:33Z

Should I enable it then? UBO is working fine for me.

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## Post 3 by @fria — 2026-04-24T23:41:24Z

It’s not released yet so you’ll stand out using it, not sure if it’s works properly yet either. It’s mostly just interesting that they are experimenting with it.

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## Post 4 by @Menkork — 2026-04-24T23:41:35Z

This is pretty cool. It’s really interesting that they’re taking this step, and I wonder if it could be opening up the possibility that Mozilla eventually phases out MV2 support someday, since they had mentioned before that it might happen down the road. Either way, this looks like a pretty big win for Firefox.

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## Post 5 by @any1 — 2026-04-25T16:09:38Z

> Interestingly, Tor browser has been [looking](https://gitlab.torproject.org/tpo/applications/tor-browser/-/work_items/17569) into shipping UBlock Origin, a highly popular content blocking extension, into Tor browser by default.

Since this has been pushed back to release 17 (not 16 anymore), it might never get added depending on how this develops I guess.

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## Post 6 by @ch0ccyra1n — 2026-04-25T16:15:47Z

If what you use works fine, unless there’s some sort of serious security issue found in Ublock Origin, I don’t see a reason to switch even after `adblock-rust` gets more fleshed-out and stops being effectively an experimental feature at best.

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## Post 7 by @Menkork — 2026-04-25T17:04:24Z

Oh, it got pushed back? Man, this must have been a real “steal your girl” moment.

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## Post 8 by @Cobson — 2026-04-25T22:52:27Z

I really hope this gets added to the iOS version, I’d love to fully switch to Firefox on all my devices but having no content blockers on iOS makes it completely worthless imo.

And yeah I could use brave but I prefer Firefox on PC, personal thing.

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## Post 9 by @fria — 2026-04-25T23:22:56Z

Firefox on iOS uses WebKit so likely won’t get added if I had to guess.

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## Post 10 by @polyester_apricot650 — 2026-04-26T01:50:35Z

Maybe there is a way to add something?

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## Post 11 by @nellaiseemai — 2026-05-01T19:14:22Z

I really like this. I use these filters in Firefox focus beta and nightly, that do not have the option of installing ublock origin as in firefox. So this is god send !!

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## Post 12 by @Soi564 — 2026-05-01T20:53:23Z

That’s awesome! It can be even more flexible than extension! And I hope it will be more lightweight than extension (critical for raspberry pi)