never cared much for this one way or another, until Firefox last update changed the status bar to white, of all colours.
now it really bothers me. my Firefox theme have darker navbar, like the branding on the desktop. they used white navbar on android now for the misguided reason of stealing chrome's look. I think the older darker navbar differentiates the browser UI from the page, and thats good from a usability point of view.
the correct fix for this will be for themes to select what Firefox paint the status bar too, so it doesn't look too weird with status bar in white with address bar in black.
but until then, is there any option to disable apps setting the status bar colour? (doesn't matter if per app or globally. consistency is good UX)