To use Firefox for debugging, you set the Eclipse-wide preference that controls which browser to use for any context where Eclipse needs a browser. It is not a Flex Builder-specific setting.
To change it, go to preferences, General, Web Browser. As for the IE problems, I am pretty sure this is caused by changes in IE's security model when Vista's UAC (User Account Control) is turned on. After finishing a debugging session, look for a process called ieuser.exe, and if it exists, kill it, and see if that allows Flex Builder to once again debug. Or, turn off UAC. This is an issue we are aware of; I don't have the bug number handy. - Mike Morearty --- In flexcoders@yahoogroups.com, Scott Melby <[EMAIL PROTECTED]> wrote: > > I have recently setup a new development machine (Vista) and in the > process upgraded to Flex Builder 3 Beta 2. On my old machine the > debugger always used firefox... and all was good :) Now, on this new > machine it is using IE and all is not nearly as good. I am only able to > open the debugger once per reboot of the machine. After that, no matter > how I stopped the debugging session, I am told that another debugger may > be running and that i should close it. I saw an open item for this in > JIRA, and it all seems to be related to IE (I think). So, I decided to > switch to debugging in FF. No luck, I can't find anything in the > builder preferences that allows me to tell it which browser to invoke > for debugging. I tried removing the IE debug flash player, but now it > just says no debug player can be found and the launches IE without debug > if I choose to continue. > So... can anybody tell me how to force it to debug in FF? > > Any help is appreciated. > > Thanks > Scott >