MidlandDeltic
The thinking of this post highlights all that is wrong with the IT world these days. Poorly developed, bug ridden software got out to market in order to appear the latest, then constant annoying upgrades to correct the resultant issues.
No need to preach to the converted, I could tell you many stories however it would probably be a fairly serious breach of the NDAs I've signed to do so.
The problem is that Firefox is a web browser. There is a continuous development of exploits against browsers. Failure to use the latest version makes you more vulnerable, particularly the average home user who has failed to get a grasp on even some of the most basic IT security concepts, for those sort of people, the layered security model is best so that hopefully they've correctly implemented at least some of the layers ! Hence the recommendation to keep the browser up to date !