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Windows Error Message: "Firefox has stopped working." The program does not open. Have had same problem with versions 41.0.1 and 43.0.2

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Locking duplicate thread.
Please continue here: [/questions/1101355]

Firefox fails to launch. A window opens with the message "Firefox has stopped working.". Occasionally, Firefox will start with "sessionrestore" (shown grayed-out) in the address bar, but then the Windows Error Message Dialog Box mentioned above pops-up, and Firefox closes. Once it fails to launch, it continues to fail to launch.

<i>Locking duplicate thread.<br>Please continue here: [[/questions/1101355]]</i> Firefox fails to launch. A window opens with the message "Firefox has stopped working.". Occasionally, Firefox will start with "sessionrestore" (shown grayed-out) in the address bar, but then the Windows Error Message Dialog Box mentioned above pops-up, and Firefox closes. Once it fails to launch, it continues to fail to launch.

Modified by cor-el