Firefox is also the only browser that vets uBlock's code on every update to make sure the developer hasn't inserted spyware or malware into the extension.

They don't do it for every extension, but they do so for a wide selection of popular options.

> Recommended extensions differ from other extensions that are regularly reviewed by Firefox staff in that they are curated extensions that meet the highest standards of security, functionality and user experience. After receiving Recommended status, safety standards are maintained through automated checks, monitoring, and periodic technical reviews

https://support.mozilla.org/en-US/kb/recommended-extensions-...

Attestion (now via captcha) means that websites will presumably block Firefox and Google’s attempt to murder the web will be complete.

What's funny is that extensions were supposed to be a way to let you do the things the browser didn't want you to do. Guess that was a bit too much freedom for Google to accept, so they had to make a store with a gate, and destroy the APIs so that they're useless. Then they had to make up some reasons to justify that and ram it through the pipeline despite everyone's objections, and the frog got boiled.

Now we're back to needing an actual extension system that does what extensions were supposed to do in the first place.

I often forget how browsing the web looks for most people. Can't understand why they put up with it, or do they just think that it's part and parcel of the internet to have every page look like a slot machine from hell?

Wtf, simply not true:

Brave: chrome://flags/#brave-extensions-manifest-v2 > brave://settings/extensions/v2 > Enable uBlock Origin (Brave-hosted, even better).

Helium comes with uBlock Origin pre-installed.

Edge even still has it https://microsoftedge.microsoft.com/addons/detail/ublock-ori...

And I'm sure others ...I personally only use/test Brave, Brave Origin, Helium and Firefox.

It is worth mentioning that there are other options like NextDNS and similar, which complement uBO(L) nicely.

Guess it was a bad idea for everyone to switch to a browser made by one of the world’s biggest advertising companies.

No-one referenced Firefox also has Brave's adblocking implementation baked in, even if disabled for now.

Additionally, I eagerly await resource (CPU+site size) buckets to be implemented on a browser and a LocalCDN along it to shrink the web.

Qutebrowser seems to _want_ uBlock Origin-style filtering, but development on the feature has been ongoing for a long time and seems to have somewhat stalled: https://github.com/qutebrowser/qutebrowser/pull/7629

For those who use uBlock Origin Lite, have you noticed any issues/deficiencies in what ads are blocked? I haven't.

Haven’t tried it but apparently there is an unofficial port of the full version of uBlock Origin to work on manifest v3, the largest challenge being that, on manifest v3, the webRequestBlocking permission is only available to enterprise sideloaded extensions: https://github.com/r58Playz/uBlock-mv3

You can have my ad blocker when you take it from my cold dead fingers. I will literally move to a shack in the woods rather than go back to late 90s level of bullshit advertising.

Support Firefox. F** Chrome.

I'm a web developer and I have a deep love of Firefox. I've been on it since version 3 and I'll be with it to the bitter end. I love that uBlock Origin is still available and while the news of Firefox's declining market share can be quite concerning, I hope it will be around for a long time.

Manifest 3 is why I finally shut down Sitetruth and Ad Limiter. Removing ads from Google Search is now possible only in Firefox.

I've been using Firefox for over 6 years now and I've never regretted it.

Remember when Firefox was the first browser to have "tabbed browsing"?

Obviously UBO isn't a first party feature - but if only Firefox could generate as much traction about ad blocking as they did with tabs.

Does it really make a huge difference to keep supporting Manifest Version 2?

I've installed uBlock Origin Lite in my Edge browser and I don't see any ads there either.

> But Firefox is one of the few web browsers remaining that isn’t based on Chromium, and it’s now the only major browser to still support uBlock Origin. Neither Safari nor DuckDuckGo—the two other major non-Chromium browsers out there—support uBlock Origin

Does anyone here use DuckDuckGo browser? I've honestly never heard of anyone using it, so I'm pretty surprised to see it categorized as a "major browser". I already basically think of Firefox users (which includes myself) as a pretty tiny minority, so I'm not sure how much smaller you can really get while still being "major".

I just use Brave. I haven't seen a YouTube ad in years.

I was shaking my head when my fellow developers, and some hackers, moved from Firefox to mostly Chrome. “It has better dev tools you see”, “it’s so much faster you see”, and a boatload of other excuses.

But what about the remonopolization of the web? I remember how much it SUCKED when internet explorer had 95% of the web thanks to Microsoft’s illegal practices. I saw the same behaviour from Google, the ad company and they haven’t event gotten a slap on the wrist. Fuck, people fucking loves Google, despite their turn to the dark side.

Well here we are, with the open web almost dead. It’s time to revive it. Start using alternatives again. Seek out and support people and organisations that are actively working to build the community web, not this corporate shit it’s morphed into.

End rant

Firefox is also the only browser that supports anything like userChrome.css for customizing tabs, toolbar, address bar, menus, spacing, etc.

I don't know why with LLMs we can't just add MV2/blocking web request support to Chromium in a fork.

The argument against was always that it's "too hard to keep a fork in sync". Now it's easier.

Thank God for the Brave browser. For those disliking their built-in adblocker, there is a Manifest v2 opt-out specifically for uBlock if you need it.

I just started using Zen (Firefox-based Arc clone) after Arc updated to Manifest V3. It's great! Last time I installed zen it was a battery hog, but it's much better now.

Obligatory:

https://www.reddit.com/r/pcmasterrace/comments/137fwhc/the_i...

1. Vivaldi supports uBlock Origin, if you consider Firefox a "major browser" then sure also Vivaldi and Brave are major browsers

2. while I use uBlock Origin on phone (Firefox) and desktop (Vivaldi), it's overrated, AdGuard works under MV3 AND unlike uBlock supports element picker, so if I was on browser not supporting uBO I would switch to AdGuard since I can't live without element picker

It is possible to write your own extension and still use it in Chrome as long as it's not bundled. It would be a huge pain to get the source for uBlock origin and implement it locally yourself, but it might be worth the pain to block ads.

Are there any Chromium-based mod/plugin loaders out there? I mean something that uses the same DLL/SO hijacking or injection tricks game hackers use to build mod loaders, to expose a hooking layer for plugins.

And we must protect it at all costs.

I love Firefox.

We need more browsers like Firefox - more open source, more open to standards that improve the web, that can improve our browsing experience.

Do people not remember Firefox changing their terms of service last year and allowing them to sell your data to third parties? I don't get it did people forget?

I switched over to LibreWolf and other browsers like that then and never looked back.

Related:

Microsoft Edge is about to lock out older ad blockers, just like Chrome did

https://news.ycombinator.com/item?id=49220392

What about Brave?

uBO + Steven Black hosts list + firefox. Peace, for now at least.

Ads are so invasive and prevalent now that you need an ad blocker just to use the internet.

Firefox is now the only major browser, because it supports uBlock Origin.

You can also run Ad Nauseum if you want to

Vivaldi 8.1 still supports it (Chromium 150) as loaded unpacked extension.

Edit: and latest August 14, 2026 Chromium 152.0.7977.38 based Snapshot https://vivaldi.com/blog/desktop/address-field-calculator-an... has this in patch notes:

"[Extensions] Re-enable and extend Manifest V2 extension support for the time being (VB-130324)"

Firefox, after 20 years, once again has an advantage over the other browsers.

Let's hope for new generations to get tired of so many ads to finally ditch chrome.

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I'm just waiting for Apple's OS level AI that lets me block ads in all apps, including the App Store

What's preventing anyone to just spend some tokens and bring it back and fork Chrome? I think ungoogled Chromium still supports it, right?

Too bad Firefox isn't a major browser.

And it shouldn't be. It's now full of ads for Mozilla VPN and stuff. We need the engine, but not the browser.

Anyone can build a custom extension to do anything an extension is allowed to do. I had ~7 standard extensions that I pretty much always install into chrome browser. Over the past month or so I've been using Claude code to build a single custom extension that handles all of the things I used 7 extensions for previously. One extension does everything. You can even use the existing extensions you already use as guides for Claude to make sure all of the features you want are included. One extension to rule them all!