Logout link doesn't work in Firefox

[waleedmebane]

Not working in Firefox 115.3.1esr (64-bit) for Windows and 88.0 (64-bit) for Linux, that I've seen.
The root cause might be the same as in issue #7 .

The problem became obvious after adding the workaround for that issue, but I'm not certain that it was working before. It might have only left the page before, when the logout link was used. Although it worked in some earlier versions that I tested, the root cause might be something to do with the long polling.