I'm not convinced downgrading was the best option. Firefox 16 fixed several disclosed security vulnerabilities present in Firefox 15. Downgrading made you vulnerable to these vulnerabilities which were known for a longer time.
Firefox 16 re-released fixing multiple vulnerabilities (The H)
Posted Oct 14, 2012 18:45 UTC (Sun) by epa (subscriber, #39769)
[Link]
In that case, Mozilla should not have pulled the 16.0 upgrade from the download sites. Either it's safer for most users than 15.x or it isn't.
Firefox 16 re-released fixing multiple vulnerabilities (The H)
Posted Oct 14, 2012 23:08 UTC (Sun) by Lennie (subscriber, #49641)
[Link]
It's obvious from the actions of Mozilla they thought 15.x was the better temporary choice.
Firefox 16 re-released fixing multiple vulnerabilities (The H)
Posted Oct 15, 2012 9:54 UTC (Mon) by epa (subscriber, #39769)
[Link]
Right, my point is, since 15.x is the better temporary choice, they needed to push out a downgrade from 16.0 to 15.x.
(This time it didn't matter too much since the vulnerability was not a severe one. But they need to have the mechanism available the next time a new version turns out to have a security hole.)