Various userscripts I use myself. Publishing them because useful things shouldn't just be for me.
Install Tampermonkey in your browser. Legitimately all there is to it. Once you've done that you can install the various scripts here by clicking on the respective header. (Also check out GreasyFork for more scripts beyond this repository.)
A decently hacky script for the osu! website that shows the amount of mutual friends you have.
A very simple script for the "Uta-Net" website that allows you to copy & select text from it, as well as use your browser context menu. JavaScript was a mistake.
There is no screenshot needed for this one.
MIT License