It turns out that guys from the forums.mozillazine.org have created a msi file.
Here is the MSI file FireFox-0.10.1PR-enUS-1.msi
CODE
reg add %Key%\060 /VE /D "FireFox" /f
reg add %Key%\060 /V 1 /D "%CDROM%\Software\FireFox\Firefox.msi /q" /f
reg add %Key%\060 /V 1 /D "%CDROM%\Software\FireFox\plugins.exe" /f
reg add %Key%\060 /V 1 /D "%CDROM%\Software\FireFox\Firefox.msi /q" /f
reg add %Key%\060 /V 1 /D "%CDROM%\Software\FireFox\plugins.exe" /f
the plugins.exe is a Winrar SFX file that contains my plugins like flashPlayer
CODE
Path=C:\Program Files\Mozilla Firefox\plugins
SavePath
Silent=2
Overwrite=1
SavePath
Silent=2
Overwrite=1
guys here is the link on how to integrate most download managers to firefox.
http://plugindoc.mozdev.org/windows4.html