--- title: Firefox is now the last major browser that still... description: Firefox has confirmed via Bluesky that it will continue supporting uBlock Origin, positioning it as the last major browser to do so. Microsoft Edge is... canonical: https://daily.dev/posts/firefox-is-now-the-last-major-browser-that-still-supports-ublock-origin-dqtsnxc3h twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Firefox is now the last major browser that still supports uBlock Origin | daily.dev og:description: Firefox has confirmed via Bluesky that it will continue supporting uBlock Origin, positioning it as the last major browser to do so. Microsoft Edge is... og:url: https://daily.dev/posts/firefox-is-now-the-last-major-browser-that-still-supports-ublock-origin-dqtsnxc3h og:image: https://api.daily.dev/og/posts/dqtsnxc3h.png og:image:alt: Firefox is now the last major browser that still supports uBlock Origin og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Firefox is now the last major browser that still supports uBlock Origin **[Lobsters](https://daily.dev/sources/lobsters)** · 2 min read · 37 upvotes · 9 comments ## Summary Firefox has confirmed via Bluesky that it will continue supporting uBlock Origin, positioning it as the last major browser to do so. Microsoft Edge is following Chrome's lead in migrating to Manifest V3, which strips ad-blocking extensions of the APIs needed for full functionality, forcing users onto the weaker uBlock Origin Lite or built-in ad blockers. Neither Safari nor DuckDuckGo support uBlock Origin either, leaving Firefox as the sole non-Chromium holdout without compromises for ad-blocking purists. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### Why is uBlock Origin being removed from Microsoft Edge? Microsoft Edge is moving to the Manifest V3 extension architecture, following Google Chrome's lead since Edge is built on Chromium. Manifest V3 removes the extension APIs that ad blockers like uBlock Origin need to properly identify and block ads during browsing and video playback, forcing users toward uBlock Origin Lite or Edge's built-in ad-blocking feature instead. _daily.dev helps developers track how manifest v3 changes affect browser extension compatibility across projects._ ### Which browsers still fully support uBlock Origin instead of the Lite version? Firefox is the only major browser that still fully supports uBlock Origin, since it is not based on Chromium and has confirmed its support isn't changing. Safari and DuckDuckGo, the other major non-Chromium browsers, do not support it either, leaving Firefox as the sole option without compromises for users who want complete ad-blocking functionality. _developers evaluating browser compatibility for extensions can follow ad-blocker support changes on daily.dev._ ## Community take How the wider developer community reacted, aggregated from 2 discussions and 1015 comments across hackernews, lobsters (as of 2026-09-14). **TL;DR:** Commenters largely see Firefox's continued uBlock Origin support as a genuine differentiator and praise its extension vetting, but many argue Mozilla should just bake ad-blocking in natively, and a vocal minority distrusts Mozilla's motives or finds Firefox itself flawed. **Sentiment:** 45% positive · 35% mixed · 20% skeptical **The case for** - Mozilla vets popular extensions like uBlock Origin on updates to guard against malware/spyware being inserted. - Firefox is seen as the only major non-Chromium browser resisting Manifest V3's crippling of ad-blockers. - Some note Firefox already ships an experimental built-in adblocker (adblock-rust) accessible via about:config. **The pushback** - Many argue it's hypocritical for Mozilla to claim user-first values while not bundling ad-blocking by default. - Some don't trust Mozilla to implement built-in ad-blocking without eventually allowing 'acceptable' ads or telemetry. - Concerns that baking in ad-blocking would trigger websites to block Firefox users outright, as seen historically. - Reports of Firefox instability, crashes, and compatibility issues (e.g. video acceleration, Cloudflare CAPTCHAs) pushing some users to Chromium browsers. - Native/Safari-style content-blocker APIs are criticized as too limited compared to uBlock Origin's full capabilities. **By community** - hackernews (mixed): Discussion splits between praising Firefox's extension vetting and ad-blocking stance versus frustration that ad-blocking still isn't built in, alongside tangents on Firefox's flaws and alternatives like Brave and Ladybird. **Hottest debate:** Whether Mozilla's refusal to bake ad-blocking directly into Firefox undermines its user-first reputation or is a reasonable architectural and political choice. **Open questions** - Would building ad-blocking directly into Firefox actually trigger more websites to block or degrade service for Firefox users? - Could a more restricted, Safari-like content-blocking API ever match uBlock Origin's effectiveness without compromising extension security? **Highlights** > 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-... > — [GeekyBear on hackernews · 8 comments](https://news.ycombinator.com/item?id=49305222) > If Firefox baked in ad blocking, they would have to then deal with the financial incentive to make it worse. Sponsored ads, 'good' ads, government announcements, election propaganda... there is a slippery slope they are better off not getting on. A trusted 3rd party from the wider community seems a better option in many ways. The alternative is starting a web browser with a manifesto welded on that essentially states 'death to all advertising', and until that can be crowd funded I can't see that happening in today's world. What I am surprised about is that none of the browsers or forks have created a specialist plugin API for adblocking and maybe other filtering. Provide what is needed and only that (keeping the surface tiny), and then evolve the general purpose API in the way they need. I don't think we need V2 of the API any more, except for keeping this one absolutely critical plugin working, do we? > — [stubish on hackernews · 1 comments](https://news.ycombinator.com/item?id=49306627) > I’m a huge fan of Mozilla and Firefox specifically, but I don’t think that the way classical adblock extensions are made is the right way. Instead, it should be done as Apple/Safari do it [1]: the browser provides an API to hook/set a block list of identifiers that should be blocked, it could be resource hostnames, html signatures, need to think how to improve the API, but this way it’s completely safe, extension has zero access to the actual page content. Apple does the same for caller id apps. Afaik, Android has this API too, but the last time I checked, all relevant extensions were just “give me your whole phone control or web page access”, so Google clearly doesn’t enforce it Yes, it kinda gives more control to the platform, but so far, iOS extensions that use this API worked surprisingly well for me Please, correct me if I am wrong and uBclock can already work in this restricted mode And the last thing, if people really want to give someone a full page content access, they surely should be able to do that, so kudos to Mozilla [1] https://developer.apple.com/documentation/safariservices/cre... > — [ololobus on hackernews · 6 comments](https://news.ycombinator.com/item?id=49309148) > Websites already can barely be assed to care about supporting Firefox users, doing adblocking by default is a great way to get websites to start putting up banners that say "our website does not work with your browser, please switch to Chrome" en-masse. And Mozilla did develop anti-fingerprinting tech, but they can't enable it by default because it breaks lots of websites and when a website doesn't work they're not going to appreciate Mozilla for protecting them, they're going to be pissed that it doesn't work. > — [dralley on hackernews · 6 comments](https://news.ycombinator.com/item?id=49306053) > Absolutely not. This is exactly why people have a problem with Chromium, which now has some of the same restrictions on extensions as Safari (Manifest V3). - uBlock Origin works best on Firefox: https://github.com/gorhill/uBlock/wiki/uBlock-Origin-works-b... - uBlock Origin Lite FAQ: https://github.com/uBlockOrigin/uBOL-home/wiki/Frequently-as... > — [commoner on hackernews](https://news.ycombinator.com/item?id=49309306) **Source threads** - [hackernews](https://news.ycombinator.com/item?id=49303202) · 1190 points · 989 comments - [lobsters](https://lobste.rs/s/lfmss9/firefox_is_now_last_major_browser_still) · 83 points · 26 comments ## Community discussion Top comments from developers on daily.dev. **@devmandan** · 7 upvotes > **Google**: We need to kill Ad Blockers, it's affecting our revenue. > > **Google**: Let's replace driving traffic with an A.I summary, lol. > >  **@baz14** · 6 upvotes > Dependence on a single product monopolizing a market can significantly undermine it by introducing functionality that users don't need 😬 > > Google has long relied on ad as its primary source of revenue and will fight adblockers to the bitter end. But thanks to Chromium's openness, there's a solution😉 For example, Thorium announced it would support mv2, Brave is effectively integrating an adblocker into the core. > > I think many non-technical users will find it easier to switch to Brave. It already has everything they need by default, and it's based on Chromium.But for maximum stability,... **@akkitto** · 3 upvotes > Using [https://librewolf.net/](https://librewolf.net/) and ain't stopping. **@hazington** · 3 upvotes > Imho, the built-in ad-blocker and tracking-prevention in web browsers like Vivaldi or Brave made extensions like uBlock unnecessary to me. **@andradei** · 1 upvotes > Then you get Brave Origin and Helium which hack ad blocking into the Chromium browser itself. > > > I attribute Firefox's lack of more market share to Mozilla itself spending money on anything but actual work on the browser and its engine. > > > These guys have parties throughout the world, spend on branding no one needed, then make deals to have the browser use certain default search engines, sponsored sites, extensions, etc. > > > I wouldn't be surprised if Google were their biggest revenue source. ## Similar posts on daily.dev - [Google is about to disable uBlock Origin and every other Manifest V2 extension in Chrome](https://daily.dev/posts/google-is-about-to-disable-ublock-origin-and-every-other-manifest-v2-extension-in-chrome-fsalmwaeg) · The Next Web · 112 upvotes · 29 comments - [Google Chrome’s next update will mark the end of popular ad blockers](https://daily.dev/posts/google-chrome-s-next-update-will-mark-the-end-of-popular-ad-blockers-biruzvu3b) · Lobsters · 2 upvotes · 1 comments - [Browsing tools and Ad blockers: A guide to cleaner web experiences](https://daily.dev/posts/browsing-tools-and-ad-blockers-a-guide-to-cleaner-web-experiences-zxvjvhtkg) · The Next Web · 0 upvotes · 0 comments --- Tags: [#devtools](https://daily.dev/tags/devtools), [#firefox](https://daily.dev/tags/firefox), [#microsoft-edge](https://daily.dev/tags/microsoft-edge) [View this post on daily.dev](https://daily.dev/posts/firefox-is-now-the-last-major-browser-that-still-supports-ublock-origin-dqtsnxc3h) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Firefox is now the last major browser that still supports uBlock Origin","url":"https://daily.dev/posts/firefox-is-now-the-last-major-browser-that-still-supports-ublock-origin-dqtsnxc3h","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/firefox-is-now-the-last-major-browser-that-still-supports-ublock-origin-dqtsnxc3h"},"datePublished":"2026-08-15T08:42:06.657Z","dateModified":"2026-09-14T07:18:25.317Z","description":"Firefox has confirmed via Bluesky that it will continue supporting uBlock Origin, positioning it as the last major browser to do so. Microsoft Edge is...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/61fe5867c20c7225b72214725f3e3f30?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/61fe5867c20c7225b72214725f3e3f30?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"Lobsters","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"Lobsters","logo":"https://media.daily.dev/image/upload/s--tl8v_Fku--/f_auto,t_logo/v1698841318/logos/lobste.jpg","url":"https://daily.dev/sources/lobsters"},"commentCount":9,"discussionUrl":"https://daily.dev/posts/firefox-is-now-the-last-major-browser-that-still-supports-ublock-origin-dqtsnxc3h","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":37},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":9}],"keywords":"devtools,firefox,microsoft-edge","timeRequired":"PT2M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Lobsters","item":"https://daily.dev/sources/lobsters"},{"@type":"ListItem","position":3,"name":"Firefox is now the last major browser that still supports uBlock Origin"}]} {"@context":"https://schema.org","@type":"WebPage","@id":"https://daily.dev/posts/firefox-is-now-the-last-major-browser-that-still-supports-ublock-origin-dqtsnxc3h","comment":[{"@type":"Comment","text":"Google: We need to kill Ad Blockers, it’s affecting our revenue.\nGoogle: Let’s replace driving traffic with an A.I summary, lol.","datePublished":"2026-08-18T10:30:05.850Z","dateModified":"2026-08-18T10:30:18.094Z","url":"https://daily.dev/posts/dqtsnxc3h#c-BfJhUdMYT","author":{"@type":"Person","name":"Daniel","url":"https://daily.dev/devmandan","image":"https://media.daily.dev/image/upload/s--ypn2TBF9--/f_auto/v1786619820/avatars/avatar_qDApMJOupymFKtjAmmtB4?_a=BAMAMicg0"},"interactionStatistic":{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":7}},{"@type":"Comment","text":"Dependence on a single product monopolizing a market can significantly undermine it by introducing functionality that users don’t need 😬\nGoogle has long relied on ad as its primary source of revenue and will fight adblockers to the bitter end. But thanks to Chromium’s openness, there’s a solution😉 For example, Thorium announced it would support mv2, Brave is effectively integrating an adblocker into the core.\nI think many non-technical users will find it easier to switch to Brave. It already has everything they need by default, and it’s based on Chromium.But for maximum stability, Firefox, with its own engine, is the most reliable choice.","datePublished":"2026-08-16T07:04:19.908Z","url":"https://daily.dev/posts/dqtsnxc3h#c-vx8Oabtd0","author":{"@type":"Person","name":"Baz","url":"https://daily.dev/baz14","image":"https://lh3.googleusercontent.com/a/ACg8ocKd2iFU8YS4sV-rBJptuYSF8EHeQnm23N_dcXE1uON7_GMIlZg=s96-c"},"interactionStatistic":{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":6}},{"@type":"Comment","text":"Using https://librewolf.net/ and ain’t stopping.","datePublished":"2026-08-16T09:59:47.392Z","url":"https://daily.dev/posts/dqtsnxc3h#c-G06RSCuqb","author":{"@type":"Person","name":"Daniel","url":"https://daily.dev/akkitto","image":"https://media.daily.dev/image/upload/s--FtwJqX4c--/f_auto/v1754900041/avatars/avatar_29TCpY2hJR72V3BlxPXzX?_a=BAMClqZW0"},"interactionStatistic":{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":3}},{"@type":"Comment","text":"Imho, the built-in ad-blocker and tracking-prevention in web browsers like Vivaldi or Brave made extensions like uBlock unnecessary to me.","datePublished":"2026-08-16T09:26:39.784Z","url":"https://daily.dev/posts/dqtsnxc3h#c-MXH67t9sm","author":{"@type":"Person","name":"Erik Hazington","url":"https://daily.dev/hazington","image":"https://media.daily.dev/image/upload/s--O0TOmw4y--/f_auto/v1715772965/public/noProfile"},"interactionStatistic":{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":3}},{"@type":"Comment","text":"Then you get Brave Origin and Helium which hack ad blocking into the Chromium browser itself.\nI attribute Firefox’s lack of more market share to Mozilla itself spending money on anything but actual work on the browser and its engine.\nThese guys have parties throughout the world, spend on branding no one needed, then make deals to have the browser use certain default search engines, sponsored sites, extensions, etc.\nI wouldn’t be surprised if Google were their biggest revenue source.","datePublished":"2026-08-18T15:03:08.630Z","url":"https://daily.dev/posts/dqtsnxc3h#c-vkaU2i1wH","author":{"@type":"Person","name":"Isaac de Andrade","url":"https://daily.dev/andradei","image":"https://avatars.githubusercontent.com/u/2653546?v=4"},"interactionStatistic":{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":1}}]} {"@context":"https://schema.org","@type":"FAQPage","@id":"https://daily.dev/posts/firefox-is-now-the-last-major-browser-that-still-supports-ublock-origin-dqtsnxc3h#faq","mainEntity":[{"@type":"Question","name":"Why is uBlock Origin being removed from Microsoft Edge?","acceptedAnswer":{"@type":"Answer","text":"Microsoft Edge is moving to the Manifest V3 extension architecture, following Google Chrome's lead since Edge is built on Chromium. Manifest V3 removes the extension APIs that ad blockers like uBlock Origin need to properly identify and block ads during browsing and video playback, forcing users toward uBlock Origin Lite or Edge's built-in ad-blocking feature instead. daily.dev helps developers track how manifest v3 changes affect browser extension compatibility across projects."}},{"@type":"Question","name":"Which browsers still fully support uBlock Origin instead of the Lite version?","acceptedAnswer":{"@type":"Answer","text":"Firefox is the only major browser that still fully supports uBlock Origin, since it is not based on Chromium and has confirmed its support isn't changing. Safari and DuckDuckGo, the other major non-Chromium browsers, do not support it either, leaving Firefox as the sole option without compromises for users who want complete ad-blocking functionality. developers evaluating browser compatibility for extensions can follow ad-blocker support changes on daily.dev."}}]} ```