I cant uninstall firefox, when I try to install a new version from the mozilla site, it will not install. If I try to use firefox I get a fix my slow pc option and a webaddress called flipora> your suggestions below dont work either!
What happens if you try to drag the Firefox application to the trash?
If there are problems with updating or with the permissions then best is to download the full version and trash the currently installed version to do a clean install of the new version.
Download a new copy of the Firefox application and save the disk image file to the desktop
Your personal data is stored elsewhere in the Firefox profile folder, so you won't lose your bookmarks and other personal data when you uninstall and (re)install Firefox.
Create a new profile as a test to check if your current profile is causing the problems.
See "Creating a profile":
If the new profile works then you can transfer some files from an existing profile to the new profile, but be cautious not to copy corrupted files to avoid carrying over the problem.
Firefox always has a "Profile", and if the user deleted the Profile Firefox will automatically create a new Profile on the next launch.
You can use this button to go to the current Firefox profile folder: