In Firefox Quantum, how can I get rid of the tab bar, you only need Tree Style tabs

Question

I have been a Firefox add-on in the style of Tree Style Tabs for a long time. This is actually the reason I use Firefox

Firefox automatically updates to the new version, Firefox Quantum. Now there is an annoying tab bar on top, which is redundant because Tree Style tabs also put tabs on the left.

Is there a way to disable tabs on the top bar? If not, is there a way to revert to the old version of Firefox and not upgrade it to Firefox Quantum?

Answer 1

In further research, I realized that my question is a duplicate of the one posted here .

The answer there worked for me, although it was a little painful (you need to create a text file in a magical place, and the first time I tried to put it in the wrong place). It would be nice if it were a configuration option provided in the Firefox menu.