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Upon start-up of Firefox, user account control is asking for permission to modify the hard drive on my computer before launching the program...this is a new developemenent in the last few days. In the past Firefox would launch without asking this.

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user account controls dialog box comes up before Firefox.

"Do you want to allow the following program to make changes to this computer?"

Yes launches Firefox, No closes the dialog box.

user account controls dialog box comes up before Firefox. "Do you want to allow the following program to make changes to this computer?" Yes launches Firefox, No closes the dialog box.

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Check that you do not run Firefox as Administrator.
Right-click the Firefox desktop shortcut and choose "Properties".
Make sure that all items are deselected in the "Compatibility" tab of the Properties window.

  • Privilege Level: "Run this program as Administrator" should not be selected
  • "Run this program in compatibility mode for:" should not be selected

Also check the Properties of the firefox.exe program in the Firefox program directory.