I thought the topic was about the slow (or delayed) cold startup time of Firefox.. First impressions.. 
Back to the topic, I hope they fix the very frequent crash issues.. and memory usage too.
lol no...

anyway, your post is the first one in this thread, after mine, talking about firefox. Don't know exactly why it was delayed, Opera doesn't count for Mozilla. Some third party developers steal ideas from Opera to develop extensions for Firefox, that's another story.
The only thing Mozilla has to be careful with concerning the competition is Google Chrome's speed...and btw even if not what they expected, Google Chrome market share is already above Opera, after just a few months or a year, when ...how old is Opera again


as far as I'm concerned, in terms of functionality and security, Firefox rules, expecting a bit of speed though. the cold start duration is really an issue, especially when you load many extensions. As to memory issues and crashes, never saw that, heard of it frequently but never experienced it myself.