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 Unsupported operating systems do not receive security updates, have known exploits and can be dangerous to use, which makes it difficult to maintain Firefox on those versions. Up until July , we will be updating affected users with critical security updates through the Firefox ESR channel to help retain the best possible security.
After this, no security updates will be provided. More Mozilla Innovation. Firefox release notes are specific to each version of the application. Select your version from the list below to see the release notes for it. Download Firefox Firefox Privacy Notice. Get Mozilla VPN. Firefox Blog Read about new Firefox features and ways to stay safe online. Release Notes Get the details on the latest Firefox updates.
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