Keep using Firefox! Encourage everyone you know (without being too obnoxious of course) to switch. Help them switch if they’re receptive to the idea. Support them in staying with Firefox if they have extension requirements, workflow concerns, whatever.

The pitch for Firefox should be easy nowadays. Talk about how it’s privacy-focussed while still being competitive with Chrome in performance and ease of use. A lot of people know that Fa$ebook is evil and gobbling up all their data, but they don’t feel like there’s that much they can practically do. Switching to Firefox and using Containers is something anyone can do easily.

Of course there’s probably bigger things that you could do. But thinking locally (if you’re not already) is absolutely required before you then think globally, IMO.