Make the browser forget website data (like cookies, local storage, etc.), except for the data you want to keep by adding domains to a whitelist, graylist, blacklist, or redlist.
View archived and cached versions of web pages on 10+ search engines, such as the Wayback Machine, Archive.is, Google, Bing, Yandex, Gigablast, WebCite, Sogou, Memento, Naver and Yahoo Japan.
Advanced Feed Reader - Read news & blogs or any RSS/Atom/RDF source.
This extension prevents Google and Yandex search pages from modifying search result links when you click them. This is useful when copying links but it also helps privacy by preventing the search engines from recording your clicks.
Tons of features to improve your user experience on YouTube™.
Lets you fix annoying sound problems in YouTube videos and such. Like audio in one channel only, too quiet or too loud. (Unfortunately, doesn't work on many other websites because of cross-domain issues — but it does work on YouTube.com!)
YouTube High Definition is a powerful tool that will let you automatically play all YouTube videos in HD (High Definition), turn off annotations, change video player size, auto stop videos, auto mute videos, control embedded videos and much more.
Speed up, slow down, advance and rewind any HTML5 video with quick shortcuts.
Good old Wikipedia gets a great new look
Shows previews of linked articles on Wikipedia pages.
Search for highlighted text on Wikipedia via the context menu.
Redirects to a random unusual Wikipedia page when you open a new tab, because when you're opening a new tab you're looking for a distraction and that distraction might as well be a weird fact. Or show random Cognitive Bias, or Philosophical concept.
Show tabs like a tree.
New Tab Override brings back the ability to change the page which is shown when opening a new tab.
Automatically refresh tabs based on custom time intervals
OneTab - Too many tabs? Convert tabs to a list and reduce browser memory