I'm just guessing, but if you ever installed software for a Barnes & Noble Nook eReader, that may have been one of the features included in the package. I have no idea what it does.

Firefox finds most plugins by scanning the Windows registry. If you cannot uninstall the plugin through the Windows Control panel or the associated software, it might be simplest to keep it disabled.

If you really want to remove the file from your hard drive, there are some ways to locate it, but I'm not sure whether it's worth the effort. But check out: https://support.mozilla.org/en-US/kb/troubleshoot-issues-with-plugins-fix-problems#w_manually-uninstalling-a-plugin

Thanks -The B&N reader is the likely source

When I search that file name, many sites associate it with "MyScrapNook" which is associated with MindSpark/FunWeb products such as Smiley Central. Many people consider this family of products annoying. If you're looking for the source, consider possible associated products/services such as:

• MyWebSearch
• Webfetti
• MyFunCards
• Smiley Central
• Smiley Creator
• CursorMania
• HolidayLaughs
• Smiley Mobile
• FestiveBar
• Retrogamer
• IWON
• MindDabble
• MyWebFace
• CouponAlert
• PopularScreensavers