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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Installing a previous version doesn't fix most problems
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:
- How to fix the Update Failed error message when updating Firefox
- Fix problems connecting to websites after updating Firefox
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 Such software may not be essential for your security but, if outdated, may interfere with the use of Firefox or cause Firefox to crash.
I still want to downgrade — where can I get the previous version?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.
- Firefox 77.0.1 (US English)
- Firefox 78.0.2 (US English)
- Firefox 79.0 (US English)
- Firefox 80.0.1 (US English)
- Firefox 81.0.2 (US English)
- Firefox 82.0.3 (US English)
- Firefox 83.0 (US English)
- Firefox 84.0.2 (US English)
- Firefox 85.0.2 (US English)
Alternatives to downgrading
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.