Hippocampus is a chrome (eg. priveledged) sidebar that searchs bookmarks and history. While the Mozilla sidebar offers bookmark search it doesn't do history search.

In general, the history sidebar is lacking. A future iteration of Hippocampus will provide recently visited pages for quick access to your recent surf trail.

Hippocampus also allows you to do Google queries if you have a Google API license key, via Alex Hodel's GoogleAPI implementation. Specify your key by editing the file .../mozilla/chrome/hippocampus/prefs.js.

Here's what it looks like:


While untested on anything but Mozilla version 1.3 at this point, Hippocampus should work all the way back to Mozilla 1.0 on Windows, Mac, Linux, etc.

Install the 0.6.0 XPI

Once installed, you'll need to restart Mozilla and enter the following into the urlbar: chrome://hippocampus/content/install.html

Feedback & Planned Features

Check out the notes page for planned features and to leave your suggestions/comments.

Release History

0.8.4 Ctrl-click to open in a new tab

0.8.3 Adds stop button. Slightly faster. 0.8.3 XPI

0.8.2 First stable release. 0.8.2 XPI


This site is graciously by mozdev.org.


Hippocampus is MPL.