Have you tried re entering the the program in the custom preview settings in preferences?
I added it and it worked
Thanks btw <img src="{SMILIES_PATH}/icon_razz.gif" alt=":P" title="Razz">
At first I thought, waterwhat .... seriously ... I googled, downloaded, .. and, nice .. firefox but like chrome <img src="{SMILIES_PATH}/icon_e_surprised.gif" alt=":o" title="Surprised">
Multiplayer works, gamepad works, good for the games at first glance ... seems lite weight.
https://www.waterfoxproject.org