Which version of Firefox should I use?

We recommend that you always use the newest version of Firefox. Warning: Older Firefox versions pose a significant security risk. Firefox 77.0.1 32-bit (US English)

What happens if I install a previous version of Firefox?

Installing a previous version doesn’t fix most problems. Problems with an update are generally not caused by the new version of Firefox, but rather the update process. Installing a previous version will not help in most cases. Instead, see: Note: Other problems can be solved with the Refresh Firefox feature.

Is it safe to downgrade Firefox to an older version?

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.

How do I update Firefox to the latest version?

Click the menu button and select Settings. 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.

Can I downgrade Firefox to a previous version of Firefox?

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.

What is Firefox extended support release?

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, but it can also be used for personal computers. Firefox ESR does not come with the latest features but it does have the latest security and stability fixes.