Those notes then sync to Dropbox.

The extension puts an icon near the address bar.

To start taking notes, tap on that icon or press Ctrl+N.

The note gets associated with the web site you’re viewing.

If you return to that site later, the same Sidenote comes up.

The extension also lets you view all your notes at once and search within them.

Sidenotes| Chrome Web Store viaI Love Free Software