FillHistory is a free Chrome add-on developed by Geoffrey Cramer. It falls under the category of Browsers and specifically the subcategory of Add-ons & Tools. This handy tool allows users to quickly fill in links from their browser history, making it easier and more efficient to access previously visited websites.

The main feature of FillHistory is its ability to open and close the search window with a simple right-click or keyboard shortcut (defaults to `Ctrl+Shift+X`). This convenient functionality saves users time and effort, as they no longer need to navigate through menus or search bars to access their browsing history.

Once the search window is open, users can search through their history using keywords. The search results continuously update as they type, providing real-time suggestions. Users can then use the keyboard arrows to navigate and select a desired result.

The selected URL is automatically inserted into the last text box that the user had selected, eliminating the need for manual copying and pasting. This streamlines the process of filling in links, making it quick and hassle-free.

Overall, FillHistory is a useful Chrome add-on for those who frequently need to access links from their browsing history. Its intuitive interface and time-saving features make it a valuable tool for enhancing productivity and efficiency.