What Firefox locale (user interface language) do you use?

Does Ctrl+L work (and possibly F6)?

Hi ReiLu, for me works the Atl + D (focus in location bar) , do you have any extension that change that behavior ?

thank you

Alt+s usually activates the History menu. If this is affecting other shortcuts, perhaps Firefox is having an issue with your keyboard, or with an anti-keylogger program.