We (me with a friend) created this page https://openwebdefenders.org and planning to create banners for websites that may want to inform their users on what’s going on.
If anyone wants to contribute somehow or have other ideas I would be happy to discuss on https://github.com/openwebdefenders/web/issues
Firefox is used by less than 3% of the users, it should not be used in this sentence. Also I’m not sure they’ll implement the integrity thing, which is another issue.