

It will install over the existing copy without you needing to delete anything, or uninstall anything. To run multiple versions correctly multiple profiles need to be used.Īll you need to do initially is to install the current version to Firefox.

but if that is done it is considered unusual, and a slightly advanced topic. That could be part of your problem, I deliberately run multiple versions. If you have a beta install of firefox and a standard install it may be normal to have two sets of program folders/paths. If you take options saying something like remove personal settings, it is likely to remove profile files form ALL normally installed versions of Firefox, and you will loose pass words and bookmarks etc. Take CARE with trying to uninstall firefox.
