Burro

Features:
* Mark all links on the current page as read by clicking a button/tab in the header
* Mark all links on the current page as read by clicking "next" at the bottom of the page
* Mark individual links as read
* More relaxed visual style
* Fixed header, so it follows as you scroll the page
* View all images as thumbnails, and mouseover for the full sized image
- Optionally, hide all NSFW thumbnails
- Currently supports direct links to images as well as:
- imgur.com / i.imgur.com
- gfycat.com
- i.redd.it / i.reddituploads.com
- youtube.com / youtu.be
- vimeo.com

Usage:
* Install the Burro extension
* On the Burro Options page, click the features you want to enable

Source available at: https://github.com/taeram/burro