Shortcuts not working on Safari with French keyboard layout

[Quentin95]

Hello, everyone.
My name's Quentin. I am the owner of a M1 MacbookAir I bought used and I upgraded to Sonoma.
I am really glad to use it. However I noticed something wrong.
When using the YouTube shortcuts 3 and 4 with Safari and the French keyboard layout, they don't work anymore. However, while using Firefox with this layout, they do work ; and when I switch to another layout on Safari, they also do work.
I have emptied the YouTube cache on Privacy menu, but it didn't solve the problem.
I also reinstalled Sonoma, but it didn't help.
As I am a new user of MacOS, I don't know where could it come from. Therefore I am seeking for your help.
Have a good day.

 

[Quentin95]

Hello again!
I found on Reddit the adblockers can disturb Safari, so I deleted them, but it didn't solve it.
I told someone with the same computer: he answered me he never had this problem (thus, his one is running on Monterey).
What would you recommend me to do?
Have a good day.

 

[Quentin95]

Hello again!
I updated Sonoma, but I didn't solve the problem.
I don't know what to do.
Have a good day.