I use this in Palemoon 25.x and Firefox 33.x without a single problem and I have a ton of add-ons installed. It's a shame to see an add-on like this dismissed, because one idgit had a prob and never considered the issue was on his side. It works exactly as described, but would be nice if the developer would keep at it a little bit. My only real complaint is that it saves the URL names, as the addresses and not the titles... other than that, it would be nice to have a couple simple aesthetic options, such as being able to change the font size (in Firefox 33 it's perfect, but my Palemoon shows them a little too big). It would, also, be nice to have an option to save the URLs for later use, but they're wiped out, when you shutdown, making it only useful during active sessions... 'course, that does seem to be it's purpose, so that's hardly a complaint.
It's basically a mini-version of OneTab or Tab Grenade and coming from one that data-mines far too much, it's a nice edition for keeping track of where you want to go or what you want to download next... without having to bookmark'em.