Caps lock press in Firefox on Mac only detected the first time pressed until window is unfocused then refocused

[thomasballinger]

Pretty weird!

Not at all a minimal repro, but for an example see https://play-endless-web.com/ (buy a ship and press caps lock to enter/exit fast forward mode, notice it continues to work in Chrome but only works the first time in Firefox)

[Daft-Freak]

May be platform specific, I can't reproduce in Firefox on Linux.