[leotaku]

I'm not sure what you mean by non-malicious extensions being intrusive. I use a number of extensions, mostly content-blocking and privacy-related and they mostly just get out of my way. The Firefox Extension Store also has a recommended extensions feature that shows that the extension has been reviewed by Mozilla for privacy and security. Most extensions I use have this seal.

[the_local_host]

I should have said potentially intrusive. Giving any extension permission to "Access your data for all websites" would give me pause.

[leotaku]

Yeah, I get that, but it seems to me like that's worse than the security model for any non-containerized application. If you don't trust the author there really isn't much there that will protect you.

[ben0x539]

That's fair, but my browser has permission to access my data for all websites, and uBlock Origin probably has my best interests in mind more so than Google Chrome.