I just got a popup asking me to upgrade to FF 15. It seems like I only upgraded to FF 14 a few weeks ago, and they've had at least 7 full versions in the past 12 or 14 months. A full version upgrade always indicated a major new release, there was an entire hierarchy on how version numbers were assigned; to jump from 14.0.1 to 15.0 in a matter of weeks goes against all conventions. What is the deal with FF and their version numbers? At this rate we'll be on v. 47.0.1 in three years, and website developers will be jumping out of windows due to the craziness of making sure their sites work on all versions.