This extension adds icons next to the quest requirements of a quest, to show whether or not they are completed.
This extension will add checkmarks or crosses to the quest and skill requirements on the Runescape Wiki, so it's easy for you to see what you have or haven't done already.
The only thing you need to do is enter your ingame name and we're good to go!
Don't trust this extension? It's open source so you can check it yourself! You can visit the source here: https://github.com/MidasLamb/RS-Wiki-Quest-Checker. It also includes instructions on how to install from source.