Uorigin Firefox

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One of the original ad blockers and one of the most popular tools for blocking ads, uBlock can be found for Chrome, Firefox, Safari and for your Mac computer. We stay up-to-date with the latest online advertising ad formats and techniques to ensure that we continue to block ads and stay a step ahead of sites that use trackers and adware to follow your around online. Firefox is one of the best browsers for blocking ads and crappy web trackers, and you can make it even better using “nuke-’em-all” browser extensions like uBlock Origin. UBlock is one of the most popular ad blockers add-ons for Mozilla Firefox browser to help block ads and pop-ups from interrupting your browsing. UBlock for Firefox can also protect your privacy by blocking trackers. Download uBlock for Firefox free now! Download uBlock Origin for Firefox. Finally, an efficient wide-spectrum content blocker. Easy on CPU and memory.

Warning: Firefox now includes downgrade protection to prevent corruption of user profile data. If you install an older version, you'll be prompted to create a new Firefox profile.
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If there is a problem with a new version of Firefox, some people may want to downgrade Firefox to a previous version but we do not recommend this. The latest Firefox version includes security updates so downgrading to an older version leaves you more vulnerable to attacks and usually doesn't fix the problem. This article gives you some alternatives to downgrading and links to older versions of Firefox if you do choose to downgrade.

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Problems with an update are usually not caused by the new version of Firefox, but rather the update process. In most cases, installing a previous version will not help. Instead, see:

Note: Other problems can be solved with the Refresh Firefox feature. It restores Firefox to its default state while saving your essential information.

Ensure all security and security-related software is fully updated. Some security software will need to be upgraded to a new version so that it is compatible with each Firefox version update.

Optional software bundled with security software also may need updating. Such software may not be essential for your security but, if outdated, may interfere with the use of Firefox or cause Firefox to crash.

If you still want to downgrade, you can visit Mozilla's directory of older Firefox versions using the links below. Please note, however, that using older versions can make Firefox insecure and more vulnerable to attacks and scams. We recommend that you always use the newest version of Firefox.
Warning: Old Firefox versions pose a significant security risk.
  • Firefox 77.0.132-bit (US English)
  • Firefox 77.0.164-bit (US English)
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  • Firefox 77.0.164-bit (US English)
Uorigin Firefox
  • Firefox 78.0.232-bit (US English)
  • Firefox 78.0.264-bit (US English)
Uorigin Firefox
  • Firefox 78.0.232-bit (US English)
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  • Firefox 79.032-bit (US English)
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Uorigin Firefox Mobile

  • Firefox 80.0.132-bit (US English)
  • Firefox 80.0.164-bit (US English)
  • Firefox 80.0.132-bit (US English)
  • Firefox 80.0.164-bit (US English)
U origin firefox
  • Firefox 81.0.232-bit (US English)
  • Firefox 81.0.264-bit (US English)
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Ublock Origin Firefox Add-on

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Install Ublock Origin Firefox

  • Firefox 83.032-bit (US English)
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Where Is My Mozilla Homepage

  • Firefox 85.0.232-bit (US English)
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  • Firefox 86.0.132-bit (US English)
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You Block Origin Firefox

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Origin Firefox

Important: By default, Firefox is set for automatic updates. To prevent Firefox from automatically updating itself after you install an older version, you'll need to change your Firefox update settings: In the Menu bar at the top of the screen, click Firefox and select Preferences.Click the menu button and select ... In the General panel, go to the Firefox Updates section.

Instead of downgrading to an older, insecure version of Firefox and changing your update settings, you should consider these alternatives:

Install Firefox Extended Support Release.Firefox Extended Support Release (ESR) is an official version of Firefox developed for large organizations such as universities and businesses. Firefox ESR does not come with the latest features, but it does have the latest security and stability fixes. For more information, see the article Switch to Firefox Extended Support Release (ESR) for personal use.

Use the latest version of another browser. If you are not satisfied with the current Firefox version or it simply is not working right now, there are alternative browsers that you can use to browse the web.