For the last day, every time I open the client a new blank Firefox window opens in front.
And then randomly, eg: at the end of the character loading page. And then again when I looted a rare. And then again just driving in Undermine.
But it calms down and is not constant. For example, it doesn’t always happen if I swap to another character, but it always happens when starting the client, and then randomly during the first 10 or so minutes of play. I don’t recall it occurring later in a session - 5 is the maximum windows I have had.
It occurs when I am not touching the keyboard or mouse. It occurred when I was typing this with the client in the background. It does not happen when the client is closed.
I have rebooted my system, launcher and client without a change in this. I even did a Scan and Repair, which did a 64MB fix, but didn’t change the bug.
I just tested after renaming the Interface and WTF directories, and it still consistently occurs, no matter what character I log into.
Solved: I had a small utility installed in Windows called MSRedirect used to prevent Windows opening Edge for things like clicking on their Weather widget. This was installed for over a year but today I got a “update available” message from it.
I have no idea why it was being triggered by the WoW client on startup and then regularly after - even if the client was quit. I assume Warden was involved. I have uninstalled MSRedirect and am no longer getting the Firefox windows.