Firefox is faster than IE (though still not as fast as Chrome). But by far more importantly it simply has a much better interface. It handles tabs better and has cool features, for example you can grab a tab and drag it off the toolbar and it will become it's own window. It's location bar is way smarter. When you start typing an address it doesn't just search through history to make suggestions, it searches through bookmarks and page titles. Frankly the location bar alone, considering nothing else is reason enough to use Firefox or Chrome over IE. Smart keywords are amazing too. If there is a site on which you search frequently, say IMDB or Dictionary.com or Wikipedia, you can define any word as a smart keyword for a particular search bar on that site. Then any time you want to search that site just plug the smart keyword into the location bar, followed by your search term. For example, if I'm in the mood to order a Steven King book I can just hit alt+d (to get to the location bar) then type:
a steven king ("a" is the smart keyword I defined for Amazon.com). And the browser behaves the same as if I typed Amazon.com, hit enter, then typed the "steven king" into Amazon's search bar and hit enter. I have smart keywords set up for like 15 different sites and I use them constantly. And just little things like having to just hit the "/" key to open a search box (as opposed to ctrl+f) which pops up an unobtrusive search bar rather than a clunky separate window . . . there are so many little details that add up to a far superior user experience in Firefox.
As for 100% compatibility, that must be a rather new development because
Firefox has historically had far better compliance with web standards. I find it doubtful that this situation has changed substantially, but even if MS has caught up with Firefox on compatibility it doesn't take away from the fact that Firefox is already compatible.
Beyond that, MS is
always playing catchup. Tabs, inline spell check, integrated download manager, session restore, integrated pop-up blocking. And in any case, even if MS manages to innovate rather than imitate you can be sure that Mozilla's phenomenal open source community will have an equivalent extension available for Firefox more or less immediately. Speaking of which, talk about bloat all you want, but it's insane to not acknowledge that while there are plenty of extensions that are nothing more than bloat, there are some that add phenomenal functionality.
MS has never EVER been good for consumers with regards to web browsers. From the very beginning it used illegal business practices to crush the far superior Netscape (and then settled the antitrust lawsuit for . . . I ---steaming pile of meadow muffin--- you not . . . $750 million plus a bunch of other perks). After cheating to kill the competition in the market MS just sat there on Internet Explorer 6
for more than five years. Not a single new version of the software. And then the garbage that was Internet Explorer 7 was hastily developed
only as an "oh-crap!" response to the unexpected appearance of Firefox on the scene.
Howard, you are generally a pretty cynical guy, but you've always been a gigantic MS fanboy. Your unflinching support for them borders on the delusional sometimes.
