URL: https://www.youtube.com/watch?v=tUXdcrSbIho

Browser / Version: Firefox 70.0
Operating System: Windows 7
Tested Another Browser: Yes

Problem type: Something else
Description: At least one youtube keyboard shorcut doesnt work with firefox and AZERTY keyboard
Steps to Reproduce:
Hello there. Noticed a weirg bug with firefox, youtube and azerty keyboard. I've tested this on firefox 64bits 70.0.1, but it's apparently not new since it can be done on basilisk and waterfox as well. Happens both on windows 7 and 10.

I'm used to browsing youtube and speed up or slow down videos using my azerty keyboard, shortcuts are SHIFT + , to slow down and SHIFT + ; to speed up

Works well on all version of chrome and all chromium based browsers I tried in the past.

But any browser based on firefox, I can slow down, but I can't speed up, SHIFT + ; doesn't work. I've tried all other possible key combinations, none speeds up youtube videos, while on firefox-based browser and AZERTY keyboard

If I switch my layout to qwerty using ALT+SHIFT, I can then slow down and speed up using my physical SHIFT + ; and SHIFT + : shortcuts which are respectively < and > on the qwerty layout, so it's specific to AZERTY layout, maybe other non-QWERTY layouts but I couldn't test this.

This bug is definitely a deal breaker for me as youtube and speeding and slowing videos is most of my daily web browsing so I'll be returning to a chromium browser for now unfortunately

I've posted this issue on reddit /r/firefox and was told it would be useful to post it here.

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