Warning: Downgrading to an older version can cause loss of Firefox user data, as well as performance and security issues. We advise against downgrading so please do so at your own risk. If you must use an older version of Firefox, please a separate for the older version, to minimize data loss.
Often when there is a problem with a Firefox update, people look for a way to go back to the previous version. That usually doesn't solve the problem and will make your computer and information vulnerable to attack. This article gives you some alternatives to downgrading and links to old versions of Firefox if you do choose to downgrade. 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 Such software may not be essential for your security, but if outdated, it may interfere with the use of Firefox, or cause Firefox to crash. I still want to downgrade — where can I get the previous version?
Mozilla Firefox (known simply as Firefox) is a free and open-source web browser developed for Windows. Version History for Mozilla Firefox 38.0.6 Final. Firefox 38 was released on May 12th, 2015. This article lists key changes that are useful not only for web developers, but also Firefox and. Firefox 38.0 Nightly: January 12. This and newer versions erase the cookie permissions database of any previous Firefox version. 44.0a2 Firefox 44.0 Developer Edition.
Although Mozilla has a website with old versions of Firefox for testing purposes, it is not recommended that you use anything but the latest version. 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: Click the menu button and choose Options. In the General panel, go to the Firefox Updates section. (In 55 and below, you would go to the panel and choose the Update tab.) Go to the Advanced panel and choose the Update tab (see for details). Downgrade alternatives 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.
Is an official version of Firefox developed for large organizations like universities and businesses. Squid. Firefox ESR does not come with the latest features but it has the latest security and stability fixes. Tinyumbrella Old Versions. For more information, see the article. Use the latest version of another browser.