Firefox is my default browser. I imagine others have the same default browser. These bug reports in the Product Feedback Center will help you out:
- To avoid the issue: Visual Studio 2005 Beta 1 ignores default browser when debugging. I prefer this one; I just switch VS’ default to IE. Saves me tweaking Firefox settings. It says Beta 1, but it applies to Beta 2. Actually this is a good feature for checking layout in multiple browsers.
- To make sure it works with Firefox: asp.net Development Server need identification with Firefox on non IE-browser. I like how they blame Firefox in this one. Like silent NTLM authentication is a good thing.