This week, Mozilla released the results of a developer survey it conducted in November 2009. The survey received responses from 5,054 developers spread across 119 countries and provides some insights into how developers work with Firefox -- and what about Firefox makes it so critical as a tool for developing.
Read the whole survey wrap-up: http://www.developer.com/open/article.php/3873236/Mozilla-Developers-Talk-Up-Firefox-as-a-Key-Development-Tool.htm