As per the Wikipedia article: https://en.wikipedia.org/wiki/Stylish is owned by an AD COMPANY RECORDING YOUR BROWSING HISTORY! (Use the community created STYLUS addon instead, which does not collect anything)

Doesn't work. I created a style for a website and gave it the URL. It says it's installed for that site but doesn't change anything. If I follow the instructions on github "Applying styles to specific sites" I get "unsupported rule". The website is filled with broken links and pages loading with errors, so you can't find any information. Total waste of my time, uninstalling.

Жутко виснет оф сайт разработчика, не удобно настраивать шкурки сайтов

Cool idea, but every theme is anime, it's not easy to filter them out, and the website you use to browse the themes is slow as molasses.

Used to be good, now it absolutely SUCKS

aa

The "installed" panel is a trainwreck, the only thing that it displays correctly is the number of installed styles for the current page. Some of them are always missing from the list (often enabled ones) and some from unrelated pages are visible. If I close and re-open the popup the list changes so it can't possibly be a case of too URL filters.

It's buggy and hardly works