I've been an IE user for years, but in recent months it has gotten slow and plagued with problems. I imported my bookmarks into Firefox and switched the default browser to Firefox. There are still some sites that work better with IE, but they're few and far between.
Netscape is long dead. This video is 5 year old at least. If you want more : http://www.firefoxflicks.com/flicks/
That video was made a long time ago... probably before Chrome was a twinkle in a megalomaniacal Google programmer's eye.
There's a Firefox add-on called IE Tab which lets you switch instantly to the IE engine within FF for any such site. It's neat.
It's very handy if you're working on designing a web site and you want to make sure it functions correctly in both browsers. I've caught many a potential goof-up with that plugin.