Download previous versions of mozilla firefox

Search Support Search. Home Firefox Download, install and migration Install an older version of Firefox. 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. Table of Contents 1 Installing a previous version doesn't fix most problems 2 I still want to downgrade — where can I get the previous version?

Note: Other problems can be solved with the Refresh Firefox feature. It restores Firefox to its default state while saving your essential information. Warning: Older Firefox versions pose a significant security risk. Firefox Organizing often used sites that you don't want opened automatically can be quickly done in Tab Groups. They are great and with Tab Groups you can visually group related tabs, switch between your groups and quickly search through all of them.

To create a tab group, click the all tabs button at the far right end of the tab strip and choose Tab Groups. When you need to find something you've seen before, all you need to do is start typing in Mozilla Firefox Awesome Bar. It remembers everywhere you've been, everything you've searched for and allows you to get to it quickly when you want to go back.

The more you use it, the better it gets. You can further customize Mozilla Firefox with Add-ons. Add-ons are like apps that you install to enhance and expand the browser. If this is a problem, make sure to sync to a Firefox account first.

If you use that, you need to select the right one of the 4 variants for your device. For most modern phones it'll be arm Ensure you have auto-updating turned off in Play Store, and make sure that until we have a satisfactory latest version of Firefox, you don't accidentally "upgrade" again! Search Support Search. 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:. Ensure all security and security-related software is fully updated. Some security software will need to be upgraded to a new version for each Firefox version update. Optional software bundled with security software may also need updating.

Such software may not be essential for your security, but if outdated, it may interfere with the use of Firefox, or cause Firefox to crash.