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How do I disable or remove a plug-in that does not appear in Add-On Manager?


A few weeks ago I discovered that I had a number of pop-up windows appearing when I hovered the mouse over certain text phrases. After experimenting with it I found this was happening in Internet Explorer (IE) as well as Firefox and the pop-up windows also identified the plugin as "Shopping Sidekick Plugin". I looked in IE and found the offending Plug-in but was unable to delete or disable it because the entry in IE's plug-in manager was grayed out. I also looked in Firefox's Add-ons Manager and the Plug-in was not there at all, even though the plug-in was actively working. After doing a bit of searching, I discovered that the Plugin had an entry in Windows Control Panel under Programs. So I clicked on it to uninstall it, which it did successfully. The offending behavior disappeared from IE but I still get it in Firefox. As stated before, the plug-in does not now, nor has it ever appeared in the Add-ons Manager under Firefox. I did follow the Firefox recommendations on manually removing plugins, but using that procedure I did not find the plugin in Firefox either.

Additional System Details

Installed Plug-ins

  • Next Generation Java Plug-in 10.11.2 for Mozilla browsers
  • Shockwave Flash 11.5 r502
  • A plugin to detect whether the Adobe Application Manager is installed on this machine.
  • The QuickTime Plugin allows you to view a wide variety of multimedia content in Web pages. For more information, visit the QuickTime Web site.
  • iTunes Detector Plug-in
  • RealJukebox Netscape Plugin
  • RealNetworks(tm) RealPlayer Chrome Background Extension Plug-In
  • RealPlayer(tm) HTML5VideoShim Plug-In
  • RealPlayer(tm) LiveConnect-Enabled Plug-In
  • RealPlayer Download Plugin
  • Google Update
  • Adobe Shockwave for Director Netscape plug-in, version
  • Adobe PDF Plug-In For Firefox and Netscape "9.5.2"
  • 4.1.10329.0
  • Coupons, Inc. Coupon Printer Plugin
  • Coupons, Inc. Coupon Printer DLL
  • Adobe Shockwave for Director Netscape plug-in, version 11.5


  • User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:18.0) Gecko/20100101 Firefox/18.0

More Information

  • Top 10 Contributor
  • Moderator
2046 solutions 8901 answers

hello, in the firefox terminology this would likely be an extension in the addons-manager. please go to firefox > addons > extensions & remove any suspicious entries (toolbars, things that you have not installed intentionally, don't know what purpose they serve, etc). also do a full scan of your system with the security software that you have in place and different other tools like the free version of malwarebytes & adwcleaner.

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