User Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:84.0) Gecko/20100101 Firefox/84.0

Steps to reproduce:

Firefox 84.0 x64 on Pop! OS 20.10 (ubuntu clone) with X11. When you go into 'Manage Extension Shortcuts' and want to add a shortcut. It should be possible to add any key to a shurtcut, not just the keys which appear on a ANSI layout keyboard in the same place as your (whichever you are currently using) keyboard.

I for e.g.s. am running a ISO CH-Layout and want to add [CTRL] + [<] to an extension shortcut.

Actual results:

You can't set the shortcut to any key which isn't in the same place on a ANSI layout keyboard.

Expected results:

Firefox should take any key (for e.g.s. also [<], ['] key) for a shortcut

I am glad to help if any info is needed on my part. Pls shoot me a msg.

Also I can reproduce this on my Windows 10 machines (also FF 84.0 and 84.0.1, both x64).

Bugbug thinks this bug should belong to this component, but please revert this change in case of error.

The set of keys are hardcoded to a subset of all possible keys, to ensure that extensions can choose keys that are supported by every keyboard.

• Permitted values for the commands extension API: https://searchfox.org/mozilla-central/rev/f8a41209af503016e78278774052d48d8c52b91c/toolkit/modules/ShortcutUtils.jsm#233-235
• about:addons: https://searchfox.org/mozilla-central/rev/f8a41209af503016e78278774052d48d8c52b91c/toolkit/mozapps/extensions/content/shortcuts.js#58-128
• Extension developer documentation: https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/manifest.json/commands#Shortcut_values

This feature request basically asks for more supported keys. I wonder whether this is feasible.