This is the third avenue of FIFA World Cup advertising I've had to block in Firefox for Android (two different home page ads and now this notification), and my patience is starting to run thin.

Are there good mobile browser alternatives that support the same extension Firefox does (in my case, uBlock, SponsorBlock and Video Background Play Fix)?

Also, and I imagine the answer to this is "no", do those alternatives support the sync features of Firefox? I actually use and quite like those.