The old menu did have an automatic automated way to solve this. I'm not sure if it goes all the way back to Firefox 1.0, but it's pretty old. (At least Waterfox

The old menu did have an automatic automated way to solve this. I'm not sure if it goes all the way back to Firefox 1.0, but it's pretty old. (At least Waterfox Classic exists and you can install it and see the menu there.) That it wasn't very good (as detailed in the post) suggests replacing it with a better version, but this goes beyond that in removing the ability to pick something specifically when the automatic detection is wrong.