on3 Sanifier od Paul Oliver

Enhance your on3 forum browsing experience. Filter posts and threads by keyword, poster and individual thread ids. Colors the best posts based on the number of reactions. Allows you to only show posts that have at least X reactions. Opens all visible posts in new tabs so you can quickly catch up.

Super-ignored users: If you want to hide posts from certain posters, they are hidden well. If you click the "Show hidden" button, it will show all hidden posts except those by your super ignored user list. You need to type "I am an idiot" in the textbox that shows up. This extension makes it annoying to see those posts from people you have chosen to "super ignore."