Summary: We should stop registering `Alt-a` as a shortcut key for "Select All" on Linux.
Currently, Gecko registers `Alt-a` as a shortcut key for "Select All" on Linux (but you who use Linux may know "Ctrl-a" also work as "Select All"). However, this does not match with the other GTK applications nor Chromium, and this may cause a problem around menubar navigation. Therefore, I agreed with dropping this non-standard shortcut key.
Platform coverage: Linux
DevTools bug: N/A
Other browsers: Chromium on Linux does not handle `Alt-a` as "Select All" on Linux
web-platform-tests: input-events/input-events-cut-paste.html assumed that `Ctrl-a` or `Meta-a` is the shortcut key for "Select All".
Security and Privacy: Nothing affects
-- Masayuki Nakano <masa...@d-toybox.com> Working on DOM, Events, editor and IME handling for Gecko