Hi Hugo, thanks for the feedback!

The extension does support persistent hiding. You can set up rules that survive page refreshes by opening the extension popup and going to the "Options", "Auto-Hide Settings" tab. There you can add a domain and a CSS selector, and the element will stay hidden every time you visit that page.

I agree it may not be obvious from the context menu alone, so I'll think about how to make this feature more visible. Hope that clears things up!