Rated 5 out of 5 stars
Living without this extension has sucked!
I have a TON of mail subfolders! I have created a hierarchy of mail categories, with filters that move every email I receive into the proper folder. If you're like me, you'll find that being able to assign colors to different subfolder categories will make finding the one you need, in a LONG list of folders, faster and easier!
I didn't realize how much I appreciated this extension until it stopped working! SO glad it's back!