Better is a Safari extension. A Safari extension’s purview is the browser. Having a system-wide menu bar icon for a browser extension doesn’t make sense. It also clutters up the menu bar.
I’m aware that Apple just forced developers to make their Safari extensions into full-fledged apps, and I’m guessing that was the motivation to turn Better into a menu bar app. But please find an alternative, or offer an option to disable the menu bar icon.
Browser extensions belong in the browser, not the menu bar.