The latest updates for Firefox on Android have helpfully deleted my browser theme. I know themes aren't supported for now, and that would be fine— were it not for the fact that it's also left no trace of which theme I was using, so I can't even install it on Desktop or a future Android version. This is something that the user explicitly chooses and sets, and which becomes a personalized and extremely visible part of their user experience. Please tell me that there's still an `about:config` flag or back-up configuration file or something which contains an ID or URL for the theme.