How to install custom userstyles in Opera - gHacks Tech News

So called userstyles can be used to change the look and feel of websites locally. Basic examples are to change the text color or size, the background color or the position of […]

The best security addons for Opera - Avira Blog

Here's how to add proper dark themes for Ableton Live, SoundCloud

New Update - Opera Stable Update Thread, Page 10

You also get a built in-tech news feed right on the main screen

You also get a built in-tech news feed right on the main screen

Opera GX adds new color themes plus GX Cleaner to purge those

Opera browser can now force websites to load in dark theme

Critical] can't install any Styles from userstyles.org anymore

Block Search Engine Ads on Opera, Ghostery

GTasks Sidebar extension - Opera add-ons

Firefox 4 - Wikipedia

GitHub - jimbrig/jimsghstars: A curated application for browsing