Journal selections are automatically "popping out"

Just started today--I use Mozilla Firefox. Now when I click on my character sheet in Journals to open it (or any other entry in Journals, for that matter....Handouts, etc) it is automatically "popping out" as its own separate thing instead of just opening on the main Roll20 page where I can minimize/maximize by double-clicking at the top. I hope I am explaining this adequately. It isn't a gamebreaker or anything, still playable, just very annoying.

Update: Was only doing it in a pickup game I joined. I checked and none of my other games I was already in are doing it. To make it even more confusing and bizarre, the GM and players in the pickup game say it isn't happening on their end, only to me.

You can change this behavior in the settings tab of your game. It's an option near the top.

I told the GM that it must be something in his settings and only he would have control over it, but he claims he had changed nothing. Then again I'm pretty sure he was drunk.

It's a per-user setting. The GM cannot change the behavior on your browser.

Where is that from? I've never even seen that setting, certainly never changed it, and literally all of my other Roll20 games were just fine.

Never mind, found it.