Know Your Enemy
There's a lot of misinformation out there about various browsers. Firefox can/can't do this. Opera can/can't do that. There's only so much you can do to promote one product when you only know rumors or outdated facts about another.
If someone told you Opera was better than Firefox because Firefox won't let you reorder tabs, you wouldn't take them seriously. You'd know that Firefox 1.5 did just that, and you'd wonder what else they have wrong. Similarly, you won't convince an Opera user that Firefox is better because it doesn't have ads (Opera doesn't anymore). And you won't convince an IE fan that Firefox is better because of tabs and a built-in search box because they'll tell you that IE7 has both.
When you're trying to convince someone that X is better than Y, and they know Y very well, you'd better know Y well enough not to make statements that the other person knows are false. When you do, you'll lose credibility, and the rest of your argument -- the part you do know well -- will suffer for it. (I suspect a lot of software flame wars get started this way!)
So here's my suggestion: Everyone here, go and download the Opera 9 beta and (if your OS will run it) the IE7 beta. If you're on a Mac, fire up Safari. Mess around with them enough that you're familiar with how they work, what you can do with them, and how they handle your favorite web pages. That way the next time you face an IE fan (to the extent that IE has fans), or an Opera fan, or a Safari fan, you'll be armed with accurate information.
As for the post title -- I don't think it's necessary for the major browsers to be enemies. I think there's plenty of room for cordial competition rather than a cutthroat struggle. But "Know Your Enemy" is a better attention-getter than "Familiarize yourself with the competition." ;-)
