A persistent minimal note taking application — highlight and save content from webpages along with it's source information. You can later see a curated list of all the content that you've highlighted by clicking the extension button.
Works in Firefox 47+.
You can install it from Firefox's Add-Ons repository.
Please feel free to open a thread in the issues tab for issues or feature suggestions. Note: The "Export to Markdown" button is still a work in progress.