I love Firefox and I used it on and off for many years. Right now I am using Brave because I just prefer the look and feel of it. I want to move to Firefox again but I just can't stand the way the tabs look on Firefox. They are too big and ugly and it's not great on a laptop, etc. Once you have a few open then they are not readable anymore. What are some ways to change the look?
If you've got too much time https://firefoxcss-store.github.io/ I don't endorse it since themes can be buggy.
Gtk theme is working perfectly fine without any bugs in my experience