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"Sign in with Google" not working
I'm trying to sign in to a site that uses "Sign in with Google" but it's not working. I click the button, the page loads, but then the sign in with Google button comes right back. I've cleared cookies and cache and restarted my browser, disabled pop-up blocker, and tried in a private browsing session but its always the same thing
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This could be about Total Cookie Protection that partition (isolate) third party cookie and that prevents the page from getting their session ID cookie. Total Cookie Protection creates a separate cookie jar for each website you visit. This means that a third-party (ad) website can't track you across other websites you visit where it is embedded, but will also cause embedded websites not seeing that you are logged in. See "How do I know if the site breakage is caused by Total Cookie Protection?":
Having set the network.cookie.cookieBehavior pref to 5 means you isolate (partition) cross-site cookies like explained in the total-cookie-protection article. This setting can break website that use cross-site cookies.
Selecting "Cross-site tracking cookies, and isolate other cross-site cookies" sets network.cookie.cookieBehavior to '5' and enables Total Cookie Protection. Selecting "Cross-site tracking cookies" sets network.cookie.cookieBehavior to '4' and does not partition/isolate cross-site cookies, but still keeps Enhanced Tracking Protection enabled.