Hi there,

Could you please explain where the Leave feedback button is located? Sorry if that's a stupid question, but I haven't been able to find it.

Regarding the dark mode, it's actually the website developers' responsibility to ensure their site supports dark mode. Firefox can't reliably force every website into that. However, you can try out dedicated extensions, such as Dark Reader.

The feedback button appears shortly after downloading and using firefox mobile briefly, where it asks you what you think of firefox, and then asks you if you want to submit feedback, whereby it redirects you here