Random User-Agent - Automatically change the user agent after specified period of time to a randomly selected one, thus...
Stylebot - Change the appearance of websites instantly. Preview and install styles created by other users on stylebot.me
30 Seconds of Knowledge - Become a better developer, in every new tab.
Dark Reader - Reduce eye strain in your browser with this extension that provides a dark theme for browsing.
User-Agent Switcher and Manager - spoofs browser's User-Agent string.
FreeStylerWs - Styles and skins for all popular sites in the web