Prerequisites: Create the perf ""privacy.firstparty.isolate"" and enable it Disable the perf ""network.predictor.enabled"" Disable the perf ""network.predictor.enable-prefetch"" Disable the perf ""browser.safebrowsing.malware.enabled"" Disable the perf ""browser.safebrowsing.phishing.enabled"" Create the perf ""privacy.firstparty.isolate.restrict_opener_access"" and Enable it Steps to reproduce: 1. Go to focus.de and open the login page. 2. Tap one of the social networks to login with. Expected results: The social network login page is opened and users can login to focus.de with that account. Actual results: Social login doesn't work. With fpi off, it works after pressing twice the same "Connect with..." button, but with fpi on it keeps returning to the login screen.
tracking-fennec: --- → ?
status-firefox55: --- → affected
status-firefox56: --- → affected
QA Contact: oana.horvath
Ethan, would you help check if this is something TPE SecEng team going to take? Thanks.
Priority: -- → P3
Tim, please investigate this time when you have spare time, thanks.
Assignee: nobody → tihuang
[triage@0719] +, as SecEng team is taking it.
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