I just manually installed Firefox Developer Edition by extracting the tarball to a folder in my
/home directory, creating a .desktop launcher and putting that in
/home/.local/share/applications. Now I can't set FDE as the default browser. No matter how many times I launch it and hit "yes" on the "make default browser" prompt, that prompt comes up the next time I launch it, and it's still not default.
When I go into Settings > Details > Default Applications, the drop-down menu for "Web Browser" only contains the old Firefox and something called "Browser". How can I make Ubuntu see FDE?