Grow and share your expertise with others. Answer questions and improve our knowledge base. 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 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? Volunteer Grow and share your expertise with others. Learn More. For example, On a particular software, only the version 7 of firefox is marked as "certified" and I need this specific version for support reason.
There are Major Security holes in older versions that can comprise the integrity of your personal information and your system. I suggest that if Firefox works fine with your software I'm assuming their support team is helping you with something and wants you to try Firefox 7 , i would install 7, test it, if you can upgrade to Firefox 12 and your software still works do that ASAP.
Well, the big problem with the new version model is that you get so much versions in a year that application that depends on it just can't follow. In product documentation we need to say that Our product is certified with version X of this browser.
Major version change should imply major changes If you are producing software how do you detect the Firefox version and show whether or not it is compatible? If you are, or your clients are in a corporate environment there is a possibility that Firefox ESR will be in use.
My understanding is that ESR has been brought out primarily to deal with this sort of problem ensuring software may be certified in an enterprise, and does not change as often so it will remain as Firefox 10 with point releases for a while.
Usually the browser is installed on the server itself and the server do not have access to internet or they use their own browser which is still in too many big company IE
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