I'm using Moodle 2.7.10 on a Nginx Webserver
So far I had the website run on http and only enforced https for the login process. This worked fine for all users for more than 1 year. No problems at all.
I now decided to switch the entire site to https. So I changed the wwwroot in config.php and added sslproxy like this:
$CFG->wwwroot = 'https://www.mysite.de';
$CFG->sslproxy = true;
I also redirected all http requests in the nginx config to the equivalent https so that old links remain working.
The result -> Everything works as expected
Now my problem: When using Chrome or IE as browser, I can log out and log in as I used to do it before but when I use the latest Firefox browser I get a "This page isn't redirecting properly" error when I click on "Logout".
To fix this I have found two workarounds:
1. Delete the 3 cookies stored in Firefox for the Moodle server
2. Close Firefox and start it again
If I do either one I can login again without seeing a redirect error.
Why is this error only occuring on Firefox and not in Chrome or IE and how can I fix it because I want to switch to https permanently but the redirect error on logout is annoying...
Thanks for any help