Hi, You can try to clean install a fresh copy after uninstalling the present version via Windows Control Panel '''Programs and Features'''. While uninstalling make sure to choose deleting the preferences and folders. Please also see [https://support.mozilla.org/en-US/questions/916668#answer-305338 this] regarding problems with security software. To backup important info which can be restored later, please see [https://support.mozilla.org/en-US/kb/Backing%20up%20your%20information?s=backup&r=1&e=sph&as=s this.] Some of the important files could be '''places.sqlite''' which holds the bookmarks and history, '''key3.db''' + '''signons.sqlite''' which are needed to restore the saved passwords etc. [http://kb.mozillazine.org/Profile_folder_-_Firefox Firefox Profile Folder & Files] [https://www.mozilla.org/en-US/firefox/new/ Firefox Latest]

I am no longer receiving crashes reports but it is not opening either (After unistalling and reinstalling).

Are you able to start by right-clicking and '''Run as administrator'''? Please also see [https://support.mozilla.org/en-US/kb/Firefox-not-start#w_no-error-message this]