Tab Bar / Url bar autohide

[Pandanube]

I have searched a lot, and I have not found any answer (apparently it is impossible or I am the first person to have this need), I am very new to programming and I do not know much about css or browser design, but would there be a possibility to make the bar containing the url of the web page or tabs can auto hide when it is out of focus, I know that in firefox it is possible, but I have changed firefox because lately it is going very bad, thank you very much excuse the totally stupid and absurd question, I attach an example of a new tab and a existing one, but I am not sure if it is possible to do it in thorium.