While Firefox is a completely separate entity from Chrome, Mozilla does recognize that some things are better off standardized. So if you're worried about your extensions not working on Firefox, that shouldn't be a problem.

?!? What does that even mean?

Most people will understand that as 'my chrome extensions will work on FF' or as 'my chrome extensions are also available for FF', which is not true. There are alternatives, yes, but there is real probability they will not find an exact alternative to whatver their most important chrome extension is. Yeah, there are also much better extensions available on FF (looking at you, my dearest and unrivalled uBO) but people usually don't give a crap about that, or they would have ditched Chrome already.

I am all from promoting FF but not by using so large an... approximations. I almost wrote 'lies' but those are not exactly lies, they're just missing the whole point by trying to make things (uselessly) look better than they are.

Edit: clarifications.