For some reason the default keyboard shortcut for the extension did not work for me, and I had to change it to bring up the Backnote window. Handy tool if you need to copy some sections of text from a webpage and don't want to waste time alt-tabbing between two windows to copy paste the text. I just wish it was possible to bring up the Backnote window from the extension icon itself instead of having to memorize another keyboard shortcut for a extension I don't use that often.