Exactly right. The big difference is that IE6 was a very old and limited browser -- in fact, Microsoft didn't want people to use it either. It's not the same as blocking a current and very capable browser.

UPDATE: Update 9:05 a.m. PT: Google has informed VentureBeat that the issue experienced by Firefox users on Android is a bug, and a fix will be issued “very soon.” http://venturebeat.com/2015/02/10/google-play-no-longer-supp...