I want an option to make the toolbar more compact. There was one before the redesign, but now I only have the option to make it bigger. I prefer how Firefox looked before the redesign.
Please vote for the idea "Allow resizing of the UI" that has made it to 'In Review' so the developers see that there is demand for it.
There is a secret hidden way to add "Compact" back to the Density selector. More info:
But something more discoverable certainly would be welcome.