Chrome: If you've ever searched your browser history to find a page that had something specific on it, you've probably been disappointed. Chrome's own history search only searches page titles. Deeper History searches page titles and the text that was on the page you were viewing so you can find exactly what you were looking for.
Whether you remember a comment on an article that linked to something interesting, or you recall reading about something but don't remember the headline, Deeper History can help you find it again. The add-on has a handy key command to activate -- type "dh" to enter Deeper History then type in your keywords. You'll see a list in the dropdown from Chrome's omnibar with results. Select one and press enter to go right to the page.
The video above shows you how Deeper History works. The add-on works by essentially building a database of information from all of the pages you visit. It doesn't use your actual browser history at all -- it starts working from install time forward, and it keeps its own database locally (which is never uploaded or shared.) You can see what's in it or delete it at any time. The developer behind the extension has plenty of notes in the Chrome Web Store about what the tool does and doesn't do with your data.
Hit the link below to read more, or give the add-on a try.
Deeper History [Chrome Web Store]