Works great for me! Rated 5 out of 5 stars
I've used QuickFolders for a couple of years now with no problems at all, and I love how they keep working on it (unlike so many extensions that get abandoned and die). I have hundreds of folders and QF helps me find the most important ones quickly. I particularly like the ability to drag a message to the QF tab to archive it quickly, and the fact that QF tabs drop down to reveal folders lower in the hierarchy.
First class work. Thank you very much.