Firefox tabs, when minimized, disappear. If I hover over the virtual desktop widget, it says how many minimized windows there are for each desktop, but I cannot access them, they are just live in the background.
I created a new panel at the top of the screen and moved some things around if it’s relevant.
I’ve marked the below answer as the solution to your question as it is by far the best answer you’ll get.
However, if you disagree with my choice, please feel free to take any other answer as the solution to your question or even remove the solution altogether: You are in control! (I just want to avoid even more subjective opinions being posted and confusing you even more)
P.S. In the future, please mark a solution like this:
so that the next person that has the exact same problem you just had will benefit from your post as well as your question will now be in the “solved” status.
P.P.S. To better help the next person that has the same problem as you, could you edit your answer and describe which panels you used and how you reverted exactly?