Plugin for Firefox to remove ad blocks from the page?

Question

Browsers

Hello
, there is a forum that displays a list of posts like

<li>
   <a href="/forum/message_numXXXXX.html">Spam Message заголовок</a> - <b>SpamUser</b>
   <i>09.07.2015 22:09</i>(0)
</li>

No id, etc. no.
The task is to remove all elements within which there is a tag. <b>SpamUser</b>
Which of the plug-ins for Firefox can do this?

Answer 1

Grease Monkey

Answer 2

Well, adblock has a similar function, doesn't it?

Answer 3

Adblock can do more than that, believe me