The (global) flag to disable the crash reporter as shown in "Tools > Options > Advanced > General" is stored in the file crashreporter.ini in the Crash Reports folder in the parent folder of the Firefox profile folder (%APPDATA\Mozilla\Firefox\Crash Reports%)

crashreporter.ini:

[Crash Reporter]
SubmitReport=0 or 1

Thanks cor-el for the reply.

I checked and the crash reports folder ((%APPDATA\Mozilla\Firefox\Crash Reports%)) do not have a file called crashreporter.ini

Windows probably hides the .ini file extension, so you may only see a file crashreporter in that folder.

• http://kb.mozillazine.org/Show_hidden_files_and_folders

Go to: Control Panel > Folder Options > "View" tab > under "Hidden files and folders", select "Show hidden files and folders"
To see the file extensions of all files uncheck the box "Hide extensions for known file types"

Thanks Cor-el .....

You're welcome