Ok, somebody explained this to me. It’s a Mac problem. Mozilla is being true to operating system settings in Mac OS.
There are two distinct ways around this on the user side. Both seem to work:
-
In System Preferences → Keyboard, in the Shortcuts pane, check the “all controls” radio at the bottom.
-
In Firefox, type “
about:config
” in the URL bar. There is noaccessibility.tabfocus
preference on the mac, so you’ll have to make one. Right click in the window, create a new “integer” pref, and set it to 7.
Neither of these are terribly obvious. Also, neither of these are a server-side solution for developers, which is frustrating.