I am running Windows 10 (up to date) and FF desktop version. Because of eyesight issues I run Windows 10 scaled tp 150%. As I've begun using FF I find many windows, as well as the banner, tab bar and url are very large. Therefore they take up too much screen real estate and I can't always use websites without having the last 4 or 5 lines hidden and inaccessible.

Years ago I used FF with a compact theme but these no longer seem to be available. How can I adjust the FF settings, or the Windows 10 settings for FF, so that I can both see it easily and have access to the entire length of the window? Thanks for any help and/or suggestions.