Download firefox version before 52

Mozilla VPN Get protection beyond your browser, on all your devices. Product Promise Learn how each Firefox product protects and respects your data. Firefox Relay Sign up for new accounts without handing over your email address. Mozilla Foundation Meet the not-for-profit behind Firefox that stands for a better web. Get involved Join the fight for a healthy internet. Careers Work for a mission-driven organization that makes people-first products.

Mozilla Blog Learn about Mozilla and the issues that matter to us. Close Innovation menu Mozilla Hubs Gather in this interactive, online, multi-dimensional social space. Firefox Developer Edition Get the Firefox browser built just for developers. 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 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: In the Menu bar at the top of the screen, click Firefox and select Preferences.

In the General panel, go to the Firefox Updates section. Microsoft Edge. Google Chrome Opera. Was this article helpful? Implemented the Strict Secure Cookies specification which forbids insecure HTTP sites from setting cookies with the "secure" attribute. In some cases, this will prevent an insecure site from setting a cookie with the same name as an existing "secure" cookie from the same base domain. Various security fixes.

Improved text input for third-party keyboard layouts on Windows. This will address some keyboard layouts that. Silverlight, Java, Acrobat and the like are no longer supported. Note: Firefox continues to permit SHA-1 certificates that chain to manually imported root certificates. Redesigned Responsive Design Mode to include device selection, network throttling, and more.

Improved security for screen sharing , which now shows a preview and no longer requires a whitelisted domain. Google Hangouts temporarily won't work. Download Firefox Firefox Privacy Notice. Get Mozilla VPN. Firefox for Android Get the customizable mobile browser for Android smartphones. Firefox Focus Simply private mobile browsing.