Absolutely this!
I constantly feel as if my opinion is too worthless (or even plain wrong) to leave comments literally anywhere. And while it is great to know that I'm definitely not alone and there are people who feel this way, it is very sad and unfortunate that we even have to worry about it.
So, let's try to compile a list.
Honestly, I thought it will be shorter. It makes me appreciate the authors of all these add-ons even more. If it weren't for their efforts, web browsing would be a much less enjoyable experience.