This extension has improved a lot over time. It used to break websites by making web elements & text clash, making it illegible, but this is very uncommon now. It's also ridiculously easy to disable the extension on a site-by-site basis if needed/desired.

excellent

Couldn't ask for an easier and faster way to not get flashbanged all the time

Awesome extension, devs really took care to provide a lot of customization, especially if you know even the very basics of CSS. Would recommend.