[jmercouris]

You can use a bookmarklet that blocks out already clicked URLs. You can use the 'hide visited' bookmarklet on this page https://www.squarefree.com/bookmarklets/pagelinks.html

[wiki_me]

I don't want to hide URL's i want to hide comments.

if there is a huge thread with lots of comments that you are really interested in, you read 50 comments and then come back and there is another 20 new comments, how do you easily find these comments?

[readonthegoapp]

How much would you pay for this?

[wiki_me]

IDK, why do you ask? probably not enough to fund someone to work on this.