Please note that most here believe that FireFox is an excellent alternative browser.
Therefore any assistance with "uninstalling Firefox" should not be construed as a negative recommendations of the product.
as to your immediate problem:
We've gone through similar difficulties with FireFox - installation and uninstallation.
Unfortunately, we've not struck upon an excellent solution as yet.
this is from Mozilla:http://www.mozilla.org/support/firefox/faq#uninstall
How do I uninstall Firefox?
If you installed Firefox using the installer for Windows, just uninstall it using the Add or Remove Programs applet in the Windows Control Panel.
If you installed Firefox using the compressed archives, just remove the folder you unzipped it to. Optionally, remove the profile folder, which contains all your bookmarks and settings.
Note: FireFox does not/did not require "windows installer" to install FireFox.
It can be installed simply by "unzipping" it into C:\Program Files\Mozilla\Firefox
Therefore, You "may" not find it in Control Panel - Add/Remove
If you don't, you can follow these instructions below: (from):
http://kb.mozillazine.org/Firefox_uninstall
On Windows
Open the Windows Control Panel and double-click Add/Remove Programs. Select Mozilla Firefox () in the list and click "Remove" to run the uninstaller. Even if this first step fails, as it may in some cases, continue on with the rest of the uninstall instructions.
Delete the Firefox Installation directory, located here, by default: C:\Program files\Mozilla Firefox
If you installed the Quality Feedback Agent component (aka Talkback), open the %APPDATA%\Talkback\MozillaOrg\ folder and delete all "Firefox" folders found, for example, "Firefox10" "Firefox15" and "Firefox2".
Firefox 1.5 and later: Delete the "Firefox" folder containing the profile "cache" folder and "XUL.mfl" file, located here: %USERPROFILE%\Local Settings\Application Data\Mozilla\Firefox
If necessary, remove the "Mozilla Firefox" shortcuts in the Windows Start -> Programs menu by right-clicking and deleting the entries. (This step should not be needed unless the Add/Remove Programs uninstaller in the first step failed.)
The Firefox uninstall will leave behind some Windows registry entries, which can be cleaned up using Windows regedit or a 3rd party registry cleaner. Note: registry editing is a potentially hazardous undertaking!.
You may also need to manually change some file associations or icons in Folder Options -> Filetypes even after setting a new default browser, as reported here.
Removing user profile data
This step is recommended for users who are uninstalling Firefox in preparation for a "clean reinstall". This will remove the Firefox user profile data, which includes bookmarks, passwords, cookies, preference settings and added extensions. Back up your profile data so that you can restore it later, if you wish, then delete the entire "Firefox" folder (which will include the "Profiles" subfolder and the files "profiles.ini" and "pluginreg.dat") from the Firefox profiles location.
Note: FireFox profile data contains your history and preferences. You can leave it on your system in most cases and still remove your old version of FireFox and add FireFox 2.0
Please keep us posted with your progress, as your experience will most likely help others.
Best Regards
