This app was mentioned in 3 comments, with an average of 1.00 upvote
Dolphin for Android does too. Dolphin even has flash working for sites that still play flash video. So it is a handy 2nd/3rd browser to have installed for edge cases.
https://play.google.com/store/apps/details?id=ru.pmmlabs.stylish&hl=en
Though, I'd be careful of ALL plugins, and not do any banking on a browser installed with this/any installed.
https://play.google.com/store/apps/details?id=ru.pmmlabs.stylish&hl=en It is an addon for the Dolphin browser... (best I could think of)
https://play.google.com/store/apps/details?id=com.erakk.lnreader&hl=en (Baka Tsuki's reader is very good for the limited books it has on there (only baka tsuki's site)
Dolphin Browser on android has stylish https://play.google.com/store/apps/details?id=ru.pmmlabs.stylish