Strange indeed. I'm running Perl 5.8.6 ( ActiveState) with winXP home, and Firefix 1.0.6, but I've never had a problem with the ActiveState docs. Actually I've never had a problem with any version of Firefox. Maybe it's something you should bring up on the Firefox discussion board?
Useless trivia: In the 2004 Las Vegas phone book there are approximately 28 pages of ads for massage, but almost 200 for lawyers.