You have to completely remove Firefox, that means getting rid of the Firefox profile as well which doesn't happen in a normal un-install.
Try using Revo un-installer or search for the Firefox profile folder manually and delete it.
I can't tell you where it is (Firefox profile) and this is the reason why I always use Portable Firefox and by deleting the Portable Firefox folder all is deleted without an un-install.
Why not try the Extended Service Release version of Firefox, then you don't have to un-instal your original version?
The two version won't run at the same time but they can co-exist on the same computer without one affecting the other.
https://portableapps.com/apps/internet/f...rtable-esr
Mozilla Firefox, Portable Edition Legacy 115 32 and 64 bit
https://portableapps.com/apps/internet/f...legacy-115
Try using Revo un-installer or search for the Firefox profile folder manually and delete it.
I can't tell you where it is (Firefox profile) and this is the reason why I always use Portable Firefox and by deleting the Portable Firefox folder all is deleted without an un-install.
Why not try the Extended Service Release version of Firefox, then you don't have to un-instal your original version?
The two version won't run at the same time but they can co-exist on the same computer without one affecting the other.
https://portableapps.com/apps/internet/f...rtable-esr
Mozilla Firefox, Portable Edition Legacy 115 32 and 64 bit
https://portableapps.com/apps/internet/f...legacy-115
It's not the least charm of a theory that it is refutable. The hundred-times-refuted theory of "free will" owes its persistence to this charm alone; some one is always appearing who feels himself strong enough to refute it - Friedrich Nietzsche