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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 (see this for details).
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 personal 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.
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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. 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 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 Such software may not be essential for your security, but if outdated, it may interfere with the use of Firefox, or cause Firefox to crash.
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.
Warning: Using old versions of Firefox poses a significant security risk.
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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 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 like universities and businesses. Firefox ESR does not come with the latest features but it has 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 the latest version of Firefox is causing problems for you or you just don't like something about it, please give us feedback about it here:
Firefox Lite is available in China, Indonesia, India, The Philippines, Thailand and Vietnam.
Set Firefox Lite as your default browser if you want it to open links by default. Here's how to do it:
In the Settings menu on your phone, tap Apps & notifications.
Tap Advanced.
Tap Default apps.
Tap Browser app to open a list of choices.
Tap Firefox Lite on the list.
Step 1: Clear the current browser that opens links
Open the Settings application and tap on . (On some versions of Android this button is labelled 'Applications' and you may have to tap on before the next step.)
Tap on the tab.
Tap on the current browser that opens links. This is usually the default browser which is called 'Browser' or 'Internet'.
Tap on to prevent this browser from opening links by default. If 'Clear defaults' is greyed out, then either you have not installed another browser or you have installed another browser like Opera and it is set to be the default browser. If you have installed another browser, go back to the previous step and repeat with the default browser.
Step 2: Set Firefox Lite to be the default browser for opening links
Open a link in an Android application like the Mail application.