How to uninstall Firefox if Add/Remove programs won't work?

My Firefox is completely unresponsive. I can't get a browser or anything. I just grabbed the application folder and threw it in the trash, because the add/remove program function did nothing. I also cannot download the newest version of Firefox. It tries, but then says, "Your download was interrupted".
How can I make sure I've removed ALL of the old Firefox and what can I do to download the new one?

Hello,
Certain Firefox problems can be solved by performing a ''Clean reinstall''. This means you remove Firefox program files and then reinstall Firefox. Please follow these steps:
'''Note:''' You might want to print these steps or view them in another browser.
#Download the latest Desktop version of Firefox from http://www.mozilla.org and save the setup file to your computer.
#After the download finishes, close all Firefox windows (click Exit from the Firefox or File menu).
#Delete the Firefox installation folder, which is located in one of these locations, by default:
#*'''Windows:'''
#**C:\Program Files\Mozilla Firefox
#**C:\Program Files (x86)\Mozilla Firefox
#*'''Mac:''' Delete Firefox from the Applications folder.
#*'''Linux:''' If you installed Firefox with the distro-based package manager, you should use the same way to uninstall it - see [[Installing Firefox on Linux]]. If you downloaded and installed the binary package from the [http://www.mozilla.org/firefox#desktop Firefox download page], simply remove the folder ''firefox'' in your home directory.
#Now, go ahead and reinstall Firefox:
##Double-click the downloaded installation file and go through the steps of the installation wizard.
##Once the wizard is finished, choose to directly open Firefox after clicking the Finish button.
Please report back to see if this helped you!
Thank you.

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See http://kb.mozillazine.org/Uninstalling_Firefox

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Hello LA,
The window that I have is different from the one you posted. Please see attached for mine. When I clicked on REMOVE, a message popped up and disappeared within a couple seconds. And the message is as following: "The installer is verifying the installation, please do not reboot while this dialog is being display." This same message popped up every time REMOVE is clicked but I have no luck on removing MAX.
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Looking forward for your advice. Thank you.
Valen
Attachments:
Add Remove Programs.doc ‏57 KB

When I look in Add/Remove Programs in the Control Panel it reports Firefox as 5.44GB. Could this be true? If so how do I reduce the amount of space it is taking up?

When I look in Add/Remove Programs in the Control Panel it reports Firefox as 5.44GB. Could this be true? If so how do I reduce the amount of space it is taking up?

It is quite common for the program size listings to be wrong. To check the actual size of the Firefox installation, you can manually check the size of the Firefox [http://kb.mozillazine.org/Installation_directory installation directory]. It is is typically around 26-30Mb, and the default location on 32 bit Windows is C:\Program Files\Mozilla Firefox\
There are also a couple of other locations where Firefox stores data, check the size of the following folders as well.
Firefox also stores user data such as bookmarks and passwords in the [[profiles|profile folder]]. It should be inside this folder C:\Users\''username''\AppData\Roaming\Mozilla\Firefox\Profiles\
Firefox stores temporary files in the cache. To find the location of the cache, type '''about:cache''' into the location bar. It should be inside this folder C:\Users\''username''\AppData\Local\Mozilla\Firefox\Profiles\
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