This extension allows you to browse reddit.com with no need to press "back" button or to close opened tabs. It renders your subreddits inside developer tools window, and opens links in the attached window.
Unlike other reddit extensions this is the first extension which allows you to browse any website and have complete browsing experience, without compromising your security (since target pages do not have access to developer tools).
I hope you enjoy the project and help me to make it better. It is open source and you are very welcome to contribute to the project: https://github.com/anvaka/reddit-inline :)