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How do you disable TheFreeDictionary from Mozilla Firefox?

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My browser was updated yesterday to 14.0.1 version, and now every time I double click on any word in any website, TheFreeDictionary opens in a new window defining that word. I did not download it as an extension, and if I do look it up on the Add-ons Manager, I even get the option to install it, not uninstall it. It is extremely pesky since I tend to, for various reasons, copy and paste words, and it's annoying having TFD window open each time.

How can I disable it or get rid of it? Would I have to perhaps download the extension (again, apparently?) and then disable it?

My browser was updated yesterday to 14.0.1 version, and now every time I double click on any word in any website, TheFreeDictionary opens in a new window defining that word. I did not download it as an extension, and if I do look it up on the Add-ons Manager, I even get the option to install it, not uninstall it. It is extremely pesky since I tend to, for various reasons, copy and paste words, and it's annoying having TFD window open each time. How can I disable it or get rid of it? Would I have to perhaps download the extension (again, apparently?) and then disable it?

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Hi,

You can try to delete the files named extensions.* in the Firefox Profile Folder after exiting Firefox, and then start Firefox. At startup Firefox would ask for permission and you can select Allow this installation and Continue for the needed ones, and leave the unwanted ones deselected, Click Restart only on the last tab. Afterwards you can Remove it from the Add-ons Manager.

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