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.

I love what it does in general and I love what it did with ao3 however it screws with my tumblr and the appearance of it so I decided to uninstall if it stops effecting my tumblr I would go back

Sending crap back to their servers.

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.