That's not exactly how I remember its origin story, nor how I remember it being written about when it rode its first crest of popularity. The last thing people talked about was Firefox being a tool for power users. It was "Tell your friends and relatives to switch to Firefox! Finally MSIE has worthy competition! Look at how uncluttered and easy to use it is!" I don't recall anyone talking about flexibility, or advanced features, unless they were tied into its ability to render webpages without a bunch a glitches.

Here's the introduction they gave it over at boingboing.net:

" Firefox, an Internet Explorer killer, has gone 1.0

By Cory Doctorow at 3:46 am Tue, Nov 9, 2004

Firefox, the finest, most secure Web browser ever created for average-user applications, went 1.0 today. You can download it below, toss out Internet Explorer, and be relatively assured that you computer won't be compromised due to Microsoft's bad design decisions and lax security maintenance."