ublock origin
The best add blocker to ever have worked amazing on firefox. Google has decided to remove the functionality needed to run a proper add-blocker
Block "Sign in to (website) with Google" popup
Many websites show a anoying "Login with google" popup in the right top corner of the site. This is fine when you use your google account everywhere. But suck when you dont. Because you keep clicking it away. Add the following to you MyFilters in ublock origin settings to get rid of it.
||id.google.com^
||accounts.google.com/gsi/$3p