You say I-Play is a browser, but not in Add/Remove. How do you know it is a browser? All browsers list themselves in Add/Remove, although IE may hide itself in later versions of Windows as Windows Internet Explorer.
But then you say it is in Firefox and IE. How can a browser be in another browser?
In Firefox have you tried Add-ons? (Tools > Add-ons).
In IE have you tried Add-ons? (Tools Manage Add-ons).