Tracks the posts you have already seen on Ruqqus and colors the links purple.
Also works with RuqES' expando button and infinite scroll.
Go to https://greasyfork.org/en/scripts/406754-ruqqus-viewed-posts-tracker and click the big green 'Install this script' button.
Create a new script in your prefered userscript loader (violentmonkey, tampermonkey, etc.) and copy and paste the code from script.js to it.
To report a bug please use the issue tracker on github.