Then you could, for example, use Ctrl+Q followed by:
Y for YCombinator, F for Facebook, and so forth.
Pressing Ctrl+Q not only switches into that "trigger once mode", it also displays the list of available shortcuts.
[1] https://addons.mozilla.org/en-US/firefox/addon/ShortcutKey2U...
Then you could, for example, use Ctrl+Q followed by:
Y for YCombinator, F for Facebook, and so forth.
Pressing Ctrl+Q not only switches into that "trigger once mode", it also displays the list of available shortcuts.
[1] https://addons.mozilla.org/en-US/firefox/addon/ShortcutKey2U...