Now they have put a lot of effort into that, making it one of the fastest browser to start. And yet it's bashed because they put their effort into "something" that doesn't matter to many people.
Honestly the main reason I used FF over Chrome historically was the huge and active addon selection. Chrome has caught up a lot now but I am trying to wean myself from all Google products so not ever going to use Chrome by default, simply because it is a Google product and not because it may or may not be "better" than FF.
Heck with the Chrome fans, lookit all the IE10 zealots in here!
In the business world, they are the guy that will adopt your product if you add this one feature. And when you add it, it's perfect! Well, except it's missing this one feature, and if you add that...
On the web, it's fan boys. Product X is better than Product Y because of this! Oh, Product Y is now better than Product X in that area? Well... Product X has this! And who cares that Product Y has that other features "no one ever needs that."
Or when reading reviews. They'll tell you how great the product is, how much they use it, but mark it failing marks because they also want it to have a new feature. Or this book is excellent, but I had to wait more time to get it in e-book format, so I'm going to mark it as a 1-star review before the actual book is released.
One could argue these people all make valid points. You can say they balance out the people that never complain or are always happy.
But over time, I've learned to take what these type of people say with a grain of salt. They'll always poke holes. They'll always find reasons. They'll never be happy.
Obviously, this is all my own experience. Make of it what you will.