A casualty of this is the "switch" action description for pressing tabs. That code
goes way back to our first Mac a11y support. WebKit and Chromium don't have it.
I tried to figure out when other browsers or apps had that with no luck.
Anyway, removing that description gives us the same behavior in VO as
WebKit and Chromium where there are no custom action description strings.
Differential Revision: https://phabricator.services.mozilla.com/D77342
I made more generalized mozSelectableAccessible and
mozSelectableChildAccessible classes for other things that will need
this kind of support.
Differential Revision: https://phabricator.services.mozilla.com/D66304
--HG--
extra : moz-landing-system : lando
