I would first uninstall the app using the Add/Remove Programs thing in the control pannel. Then go into C:\Documents and Settings\<your user name>\Application Data\ and delete the Mozilla folder. (Application Data is a hidden folder, so you might need to change your view options)
After which, reinstall Firefox, and my guess is things will work. If not, there's something else wrong with your OS install. I'm not aware of any spyware for IE that would affect the installation of Firefox, but I also wouldn't be surprised to know such existed. It'd keep a lot of people using IE so the spyware program can collect more data.
dows anyone know about Firefox and XPCOM_CORE.dll? I get messege like this [here is a picture of the error] http://img.photobucket.com/albums/v666/hosebeee/firefoxagain1.jpg
when I go to install a extension that i have on other version 1.03 and yesterday I download version 1.04 but won't let me get extensions. I went to site to download xpcom.xpi and run download but give me messege that say this. http://img.photobucket.com/albums/v666/hosebeee/xpcom2.jpg
I try to launch apllication but nothing happens. The extensions still no work and please excuse me about so many picture links but english still not that good, does anyone have this? Does anyone know how to fix?