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Firefox will continue to support uBlock Origin, says Mozilla

Posted on August 12, 2026August 12, 2026 by Martin Brinkmann

While companies like Google and Microsoft have dropped support for classic MV2 extensions already or are about to end support, some developers announced plans to continue supporting some or even all classic extensions.

Of all the major browsers, it is only Firefox that continues to support MV2 extensions. Mozilla has just reiterated that this is the case stating “Firefox support for uBlock Origin is not going anywhere.” on X.

Firefox support for uBlock Origin is not going anywhere. https://t.co/rhsBmU2QQG

— Firefox 🔥 (@firefox) August 10, 2026

As far as Chromium-based browsers are concerned, Brave plans to continue support for some extensions only, including uBlock Origin. Opera Software also claims to continue supporting MV2 extensions.

There are a few lesser known browsers, Thorium and Supermium, which pledged to continue their support for all MV2 extensions.

The background story

Google announced plans to switch Chromium, the open source part of Google Chrome and most browsers, to a new rules system. Called Manifest V3, or MV3, it was designed to replace the classic extensions system.

Google would not be Google if it would not have tried to pull a stunt on the browsing community by removing capabilities and replacing them half-heartedly. The outcry was big enough for Google to make some concessions, but the result was still a new system that lacked some of the capabilities of the old.

One of the types of extensions hit hardest by the changes were content blockers; exactly the extensions that threatened Google’s main source of revenue.

Tags: firefox
Category: News

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4 thoughts on “Firefox will continue to support uBlock Origin, says Mozilla”

  1. Tom Hawack says:
    August 12, 2026 at 4:04 pm

    “Firefox support for uBlock Origin is not going anywhere.” quoting Mozilla.
    Makes my day. I will never understand Firefox’s low market share.
    When you think it is the very same sheep that go voting …
    As Mahatma Gandhi proclaimed, “Truth does not wait for the count of votes.”.
    Firefox it is, Firefox it remains.

    Reply
    1. Carl says:
      August 13, 2026 at 9:08 am

      Couldn’t have said it better myself 🙂

      Reply
  2. Herman Cost says:
    August 14, 2026 at 12:08 am

    UBO (along with the numerous customization options available in about:config) is certainly at the top of the list of important features that keep Firefox firmly entrenched as my primary browser.

    Reply
    1. just an Ed says:
      August 14, 2026 at 7:05 pm

      Agreed.

      Reply

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