Well maybe not exactly zero, more devs using FF tools --> more websites designed...

robotron · on Jan 15, 2020

If you optimize for your devs use and not your users there's a problem.

hutzlibu · on Jan 16, 2020

But the user will switch to a browser that works for them. Which is happening.

All the people I know, who left FF, myself partly included, did so for this reason. Quite some sites did not work anymore on firefox. And the normal user does not care that this is because of vendorprefixes which are not standard. They care about that their website does not work anymore.

Keep the webdevs ... keep your users.