I wonder, that many people are scared of websites doing something they don't want them to do, but nobody is scared of extensions. Extensions have much bigger p

I wonder, that many people are scared of websites doing something they don't want them to do, but nobody is scared of extensions. Extensions have much bigger permissions than websites. I never used any extension in my browser. I think it is already enough, that each website knows what I do on it, what I click etc. I don't need some third party to know, what I do on all websites.