mousebutton."X"th.enabled option is not available in linux version
My additional mouse buttons are automatically mapped to back/forward and I can't undo it from the about:config tab because the mousebutton option does not appear.
- User Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:67.0) Gecko/20100101 Firefox/67.0
Does MyCoy's solution in this thread help: How to change 4th and 5th mouse's buttons?