When Firefox Stops Working, Don’t Nuke It. Delete the Profile Instead.
Firefox misbehaving? Before reinstalling, try deleting the profile—it’s often the real problem and can be fixed in minutes if you know where to look.

If Firefox suddenly stops playing nice, like when YouTube won’t load but works fine in other browsers, you might assume it’s time to uninstall and reinstall. But before you go nuclear, consider this: the problem might be your Firefox profile, not Firefox itself. Here’s how I figured that out, what steps I took, and how you can fix things without starting from scratch.