An Important Change in Firefox: Dedicated Profiles

We detected that you have installed and opened an older version of Firefox on your computer. You may need to take action.

What’s Changed

Before, all Firefox installations were sharing a single profile by default. Now, Firefox provides dedicated profiles for each Firefox installation (this includes installations of Firefox Nightly, Firefox Beta, or Firefox ESR). This will make Firefox more stable when switching between Firefox installations on the same computer.

How Dedicated Profiles Work

Firefox saves information such as bookmarks, passwords and user preferences in a set of files called your profile. This profile is stored in a separate location from the Firefox program files.

What You Need to Do