I previously wrote how to [[Assignment_1_(yshen6)|build Firefox]] in Windows for DPS909 assignment, and here I was work on how to run firefox 1.5 in debug mode by Visual Studio 2003 debuger and better understand how certain things work. == Required ==# Firefox 1.5 already build on Windows# Microsoft Visual Studio 2003 installed == Instructions ==First we need open the firefix project in Visual Studio: File>Open>Project... this will start the Open Project Dialog and you should navigate to your firefox.exe directory. For me it is: C:\proj\mozilla\hopefullyWorked.firefox.optimized\dist\bin