Falcon

Download extension

To activate, type 'f' followed by a tab or space into the Omnibox. Then enter your term and press enter to submit.Flexible full text browsing history search in Chrome! Press f, then space or tab, in the omnibar to start searching your previously visited websites! Every time you visit a website in Chrome, Falcon indexes all the text on the page so that the site can be easily found later.

More information here: https://github.com/lengstrom/falcon/.

**If you know how, I strongly recommend installing "from source" manually rather than through the Chrome Webstore**