Right, so that's part of my gripe. in keyboad shortcuts, i've got global (all applications) shortcuts for select/show next/previous tab. Those dont map to firefox. Fine, but Firefox doesn't have a menu title for next tab, so setting a shortcut for a non-named function doesn't work. I've tried the documentation(https://support.mozilla.org/en-US/kb/keyboard-shortcuts-perf...), using "go one tab to the left" doesn't work. It's just way more effort to figure out than it needs to be for a browser in 2019.....