User Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:36.0) Gecko/20100101 Firefox/36.0 Build ID: 20150305021524 Steps to reproduce: I have a Windows installation that I rarely use. Everytime I use it (every few months), my Firefox installation is of course lagging by a few versions. Now, when I start Firefox, and check "About Firefox...", it looks for new versions, and sure enough, it founds one, downloads it, and install it. Great. Except that after a restart, and checking "About Firefox..." again, well the Firefox version that was just downloaded and installed wasn't the latest. Firefox realises this and downloads this new versions, and installs it. Again. Now I'm at the latest version. Why didn't the auto updater grab the latest version in the first place? Why does it have to download an "intermediate" version? I'm filing this bug because this is not the first time this happened to me. I find this frustrating, and also time and bandwidth consuming. Today, I just witnessed my Firefox 33 first upgrading to 34.0.5, then to 36.0.1. Why not going to 36.0.1 directly? Actual results: Auto-upgrade did work but had to download an "intermediate" version/had to be run twice to get to the latest Firefox release. Expected results: Auto-upgrade should directly download and install the latest version of Firefox, like I would if I was upgrading manually.