Some of these must-haves let you tweak the browser to fit your needs and others are applications in their own right, whether for Web development or general-purpose use. “If you’ve never toyed with Firefox, one of the major features you’re missing — especially if you’re in IT — is the add-ons,” writes Paul Venezia in Top 10 Firefox extensions. “A number of add-ons have become so critical to my daily work that they preclude the use of any other browser.” Software DevelopmentTechnology Industry