I'm trying to use XulBooster on the Mac. When I go to preferences and try to set the Firefox exe I get an error: "Value must be an existing file". I'm using the browse button to select Firefox.app from /Applications. The file definitely exists.
Sorry about taking a long time to get back to you. I don't have a mac, but i have an employee that does. I will test it on there mac. I don't think the type matters Intel/PPC, but if you can give me more info on your specs that may be useful.
In OSX "Applications" actually are directories (with *.app suffix). File Dialogs hide that fact.
You need to type the real path to the binary into the input box (instead of using the browse button):