I would of given five stars, except.... It works with all except Google sites.

does not work/FAIL - Google Sign In popup = winnar

does the job. also blocks LinkedIn popup.

Did not work at all for me....so I removed it.
(Firefox v.137.0.2 64-bit running on Windows 10 Home)

So far so good, works on eBay. Thank you kind sir!!

i am literally crying with joy

I love you, developer of Google Sign-in Popup Blocker. :-)

Thank you so much! Those sign in with Google prompts were such a pain, and none of the official instructions to turn them off worked. This extension brought calm back to my world.

Ok

It works!
It also blocks pop out windows for sites that I need to login with a Google account (D&D Beyond is the only one I use that with)

Can there be an icon in the toolbar with a temporarily disable for this site option?

I've tried several methods to block that Google sign in popup and nothing has worked. I hope this add-on would do it, but it doesn't work. The popup is still there.