Firefox.exe (32 bit) continues to run in the background after closing, Im running Firefox (64 bit).

After browsing the web and downloading items from websites, with Firefox's built in download manager, then closing Firefox I'll have to open my task manager and manually stop the 32 bit .exe. Im running Firefox (64 bit) on a Win7 (64 bit) system.

see https://support.mozilla.com/questions/836193

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