Is fully open-source and can be found on github. Types of previews - Reddit - Stack Exchange solutions (Stack Overflow, Server Fault, Ask Ubuntu, ...) Supported search engines - Google - DuckDuckGo - Startpage - Searx (experimental - only works on searx.tiekoetter.com) It works by requesting public (and official) APIs when the link to a search result matches an implemented result preview. It makes no outbound requests other than these and is written in a simple fashion that makes it easy to extend. Other features - Expandable comments in Reddit - Comments in Reddit are hidden/displayed based on its upvotes compared to the post. - The main content of Stack Exchange questions are hidden by default because it's often skipped entirely.