Tor Browser should be visually distinguished from Firefox to prevent user error
More than once, I have had multiple browsers open (in this example, let's say both Tor Browser and Firefox due to their similarity) and have mixed them up, for example logging into accounts or entering information I intended to keep compartmentalized only transmitted over the Tor network. In situations where OPSEC is important, such a mistake can be very costly indeed.
This led me to give some thought to the idea that the Tor Browser should be more visually distinct to prevent this type easily committed user error that can compromise privacy and security in potentially disastrous situations. At present, the title bar and onion logo are the main distinguishing features that allow a Desktop user to know which environment they are working in. In my opinion, that's not enough. Is there anything more that can be done to customize TorBrowser's UI?
Any thoughts or ideas about this?