A UserCSS compatible userstyle manager is required, those are recommended:
Stylus for Firefox, Chrome or Opera.
Cascadea for Safari.
Mobile:
Stylus for Firefox Nighly (using this)
Note: Activate the websites own dark theme if they have one, as I (re)write over that.
Click here to install Last.fm stylesheet.
Click here to install Discogs stylesheet.
Click here to install Google stylesheet.
