Firefox is now the last major browser that still supports uBlock Origin

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-...

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 browser vendors 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.

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

You can also run Ad Nauseum if you want to

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

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

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.

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

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

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.

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!

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.

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

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

You can also run Ad Nauseum if you want to

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

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

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.

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

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

Yet 90% of people don’t use a browser capable of running ubo

Unfortunately, new generations seem to be completely fine with this. People in general, they're just so completely captured by the dark patterns that I get the impression they cannot even imagine a world without them.

I install uBlock Origin on every browser I come across. Everybody notices. The internet just feels better, somehow. People can't quite explain what changed, but they know.

It's funny. Over 20 years ago, I got people to switch to Firefox because of the AdBlock extension.

In case people don't know, Firefox was the first major browser to even have extensions.

uBlock Origin Lite works decently on Chrome so I doubt this will help migration to Firefox.

If only they focused on making Firefox the definitive good browser instead of a platform for their AI efforts.

Firefox will never convince people to leave chrome on philosophy alone. I detest Chrome with a passion and refuse to touch it with a ten-foot pole, but cannot in good faith recommend Firefox to anyone in today’s world. “It kinda works” is about as far a compliment you can give it.

Edge is just chromium under the hood. So not a surprise there, should be easy lift for them.

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.

uBlock Origin Lite works decently on Chrome so I doubt this will help migration to Firefox.

It's funny. Over 20 years ago, I got people to switch to Firefox because of the AdBlock extension.

In case people don't know, Firefox was the first major browser to even have extensions.

I install uBlock Origin on every browser I come across. Everybody notices. The internet just feels better, somehow. People can't quite explain what changed, but they know.

>Anyone can build a custom extension to do anything an extension is allowed to do

Yes, that's why google moved to manifest v3 and extensions can't do as much.

Peter Theil was an angel investor in Brave. That alone is all the reason privacy-minded users need to avoid it.

It's good but I find they EOL devices/OS's earlier than Firefox.

Isn’t Brave just another Chromium variant?

Chromium is detestable. In whatever form it takes.

Yet 90% of people don’t use a browser capable of running ubo

If only they focused on making Firefox the definitive good browser instead of a platform for their AI efforts.

Edge is just chromium under the hood. So not a surprise there, should be easy lift for them.

Because all those other browsers can still block ads. I use ubo lite for safari and it's largely fine.

What do you think doesn’t work on Firefox? Aside from Google products purposely crippled, everything works just fine in my experience. It’s fast and stable. If there’s a bunch of AI stuff in it, I’ve not seen it. Of course I believe it exists, I just don’t ever read popups anyways. To be fair, I probably use 5% of the browser’s capability (I imagine many are like me). I browse websites and I have UBO installed.

"It kinda works" is factually incorrect.

I have used Firefox exclusively every day on macOS for the past year, several hours a day, and have not one single time had to open another browser. None of the customers of my B2B saas use Firefox. Not once have I needed to test in their browsers except quick smoke testing to prove to myself that the rendering and details are identical. All my other browsing is indistinguishable from before when I used Chrome, and from on mobile where I (tragically) am forced by Apple's monopoly to use Safari.

Do you have evidence to support your false claim?

What doesn’t work? It’s my daily driver and it renders every website I visit.

Peter Theil was an angel investor in Brave. That alone is all the reason privacy-minded users need to avoid it.

It's good but I find they EOL devices/OS's earlier than Firefox.

Isn’t Brave just another Chromium variant?

Chromium is detestable. In whatever form it takes.

>Anyone can build a custom extension to do anything an extension is allowed to do

Yes, that's why google moved to manifest v3 and extensions can't do as much.

"It kinda works" is factually incorrect.

Do you have evidence to support your false claim?

What doesn’t work? It’s my daily driver and it renders every website I visit.

Because all those other browsers can still block ads. I use ubo lite for safari and it's largely fine.

In the last few months, I've seen a huge upsurge of sites that simply won't work for me in Firefox.

Not sure if it's the FF + Linux combination. Should probably try with a fresh profile to confirm.

It sucks, but I'm in on FF all the way. If much of the web stops working for me, it just means I have more time on my hands!

It will be "largely fine" until the ad networks start using the methods unsupported by the Lite version. Related discussion:

uBlock Origin Lite now available for Safari (apps.apple.com)

1156 points by Jiahang on Aug 5, 2025 | 451 comments

https://news.ycombinator.com/item?id=44795825

In the last few months, I've seen a huge upsurge of sites that simply won't work for me in Firefox.

Not sure if it's the FF + Linux combination. Should probably try with a fresh profile to confirm.

It sucks, but I'm in on FF all the way. If much of the web stops working for me, it just means I have more time on my hands!

It will be "largely fine" until the ad networks start using the methods unsupported by the Lite version. Related discussion:

uBlock Origin Lite now available for Safari (apps.apple.com)

1156 points by Jiahang on Aug 5, 2025 | 451 comments

https://news.ycombinator.com/item?id=44795825

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Viktor Eriksson

Joel Lee

News

Aug 13, 2026

Firefox recently announced via Bluesky post: “Our support for uBlock Origin isn’t going anywhere.” The moment comes in response to news that Microsoft Edge is soon going to lock out uBlock Origin and other ad-blocking extensions that run on Manifest V2 architecture.

Once Microsoft Edge moves to Manifest V3, ad-blocking extensions won’t have access to the functions needed to properly identify and block ads that occur while browsing websites and watching videos.

Microsoft’s move isn’t surprising, as Edge is based on Chromium, the open-source browser engine that powers most web browsers today, including Opera, Brave, Vivaldi, and Samsung Browser. Google initiated the migration from Manifest V2 to V3 in Chrome/Chromium, and Microsoft Edge is now following Google’s lead.

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.

For die-hard uBlock Origin fans, Firefox appears to be the only browser left without compromises. With any other browser, you’ll need to settle for uBlock Origin Lite (with fewer features and less ad-blocking success) or whatever built-in ad-blocking feature comes with the browser.

This article originally appeared on our sister publication PC för Alla and was translated and localized from Swedish.

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Firefox is now the last major browser that still supports uBlock Origin

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