I set a shortcut for All Applications,
Ctrl+; to "Move Window to Left Side of Screen"
and
Ctrl+' to "Move Window to Right Side of Screen"
it works for Safari, but when I use it on Firefox, the cursor disappears, and the Window does not move.
I set a shortcut for All Applications,
Ctrl+; to "Move Window to Left Side of Screen"
and
Ctrl+' to "Move Window to Right Side of Screen"
it works for Safari, but when I use it on Firefox, the cursor disappears, and the Window does not move.
I would guess that Firefox has built-in shortcuts (i.e. Cmd+Shift+S to take screenshots) that went into conflict with your custom shortcuts. I checked briefly on Google but didn't find any centralized built-in shortcuts settings page, maybe you'll have to dig in deeper.