Simple and functional Rated 4 out of 5 stars

Works fine.
The white square is for tagging purpose ;
The tool-bar button's drop-down menu states "toggle sticky sidebar" when in fact this command toggles the note, when applicable ;
The tool-bar button's drop-down menu offers a "display Sticky list" which opens in the sidebar what is in fact the Sticky Notes' Manager ;
The Sticky Notes Manger is worth being used, allowing notes listed by site, tag, or site and tag ;
The tool-bar button is NOT movable
4 stars because English does lack and the tool-bar button not being movable, BUT :
This is otherwise what I was searching for so, please, improve slightly this nice little add-on : thanks :)

This review is for a previous version of the add-on (0.4.0.1-signed).