That’s in fact one of the gripes I have with certain MacOS software. It would be far better if menu bar icons were opt-in rather than opt-out. The average non-technical user eventually ends up having tons of these icons in the menu bar.

The existence of a menubar icon as an option implies it’s a service that needs to run all the time. I compare that perception to what uBOL mentions in the App Store description.

> uBOL is entirely declarative, meaning there is no need for a permanent uBOL process for the filtering to occur, and CSS/JS injection-based content filtering is performed reliably by the browser itself rather than by the extension. This means that uBOL itself does not consume CPU memory resources while content blocking is ongoing -- uBOL's service worker process is required _only_ when you interact with the popup panel or the option pages.

I believe if you do that, the filter lists don't auto-update. That's the reason for the menu bar app.