Os error : invalid wine prefix path : make sure to create the prefix before saving to the registry

Hello to everyone.

I’m trying to install Firefox on Lutris,but I get the error that you see below :

How can I fix it ?

Prefixes are for use with WINE.

It looks like you are trying to launch your Linux-installed Firefox, so change the “runner” in the configuration to Linux before pointing it at the firefox executable :slight_smile:

If for some reason you are running Windows firefox from a WINE prefix, the default prefix directory path is under your home directory e.g. ~/.local/share/wineprefixes/firefoxinstall.
A working prefix always has a directory called “drive_c” in it which will contain the Windows files. Point the configuration at the prefix, and find your firefox.exe under there.