Can't login to Plex via Firefox works with Edge

Got any email notification logout all devices due to potential security incident, which I followed. Now can’t login via Firefox at all. I can login with Microsoft Wedge but that isn’t the browser I want to use. Cleared Firefox cache, disabled add-ons … Started Firefox troubleshoot mode etc etc. Nothing works.

Basically it asks for login information I enter it, then it just goes away to never login. What seemed to be a 2 second job has now turned out to be a saga. Not happy bunny.

I am using FF as well as primary browser. No issues with logging in here.

Keep in mind to disable browser extensions, particularly those which filter and block content from websites, suppress parts of web pages, or delete or block cookies.
For a successful login, you need to allow cookies and scripts from plex.tv, and *.plex.tv.
Add these domains to a whitelist so cookies from these domains don’t get deleted when you close the browser.

Edge is able to use its own DNS server. FF (and pretty much all other apps) use the DNS server that is assigned to the network connection of your Windows machine. If that DNS server is unreliable or you suspect that it might apply its own filters, pick a different DNS server to use.

Thanks for the information. Switched DNS over HTTPS within Firefox settings to off. Managed to login to Plex from Firefox. Re-enabled the previous Max Protection setting and it all seems OK now. So does look like something related to DNS setting in Firefox.

Thanks a lot

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