Amazing Extension Rated 5 out of 5 stars
I've been looking something like this for a long time and you guys did an amazing job.
Just a suggestion.
Implement a cloud feature. Instead of storing data locally, make it an online storage system. (Like xmarks and such extensions) That way data loss will not be an issue. I know hosting a service like that costs money so using a 3rd party cloud system like dropbox would be appropriate.
Edit1: Found a bug, It seems, if there are duplicate tabs with internotes, only 1 instance of the internote will be displayed. Clicking on the internote button doesn't work.Thanks again.