Only a dumb would say competition should die and one product should rule. Imagine if there was no FF, Chrome or Opera people would have still use Internet Explorer and at the mercy of MS for features, performance and security.
Only a dumb would not understand the joke... (I even put a smiley...)
More seriously now, about your reply,
1- you can use FF and other browsers because MS allowed it, they could have prevented it from the start and then you will not be here to talk about monopoly and fair competition.
Not saying, FF went down so fast, there is not even competition...and now with ChromEdge, MS has a very secure and fast browser. most people, except the early fans and privacy freaks, won't even need anything else.
2- Mr Noob don't bother install 3rd party browsers, they don't even know how to do, they use whatever the OS offers.
In the early days, FF and later Chrome became popular because they either get installed by computer resellers, IT guys or geek friends (FF) , or by aggressive marketing (Chrome) bundling it with other popular softs.
How many FF installations I did for my customers, if it wasnt for me, some will still be on WinXP using IE...