What do I do when iTunes does not open and there is a popup window with an “External Protocol Request” message?

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What do I do when iTunes does not open and there is a popup window with an “External Protocol Request” message?

April 26, 2017iTunes message popup window

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What do I do when iTunes does not open and there is a popup window with an "External Protocol Request" message?
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score 0 · Answer 1 · 2009-04-21T02:50:12+00:00

If iTunes is installed on your machine, but you are unable to access iTunes U using Firefox, and you see a blank popup page with ‘External Protocol Request’ in the title after logging into iTunes U, you will need to follow these steps in order to tell Firefox to launch iTunes.

What do I do when iTunes does not open and there is a popup window with an “External Protocol Request” message?

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