It would be convenient to have the option to display the page title in the address bar instead of the URL.For example, the title would be shown by default, but would change to the URL when the address bar is active.
I have this on Vivaldi with CSS(and JS). Had it for Firefox too, but the PC where the customizations were applied, broke last year and I haven't got around to try or get it to be fixed or the contents recovered. I mostly use FF on mobile now.
One can find such hacks for Firefox by searching on GitHub, that's where I found/adapted the script for adding titlebar.