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I want to detect if user has IDM (internet download manager) extension installed in his browser...how can I do it?

I tried using navigator.plugin but it doesn't work

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    If you're the author of the extension, you can do one of the things suggested here https://stackoverflow.com/q/6293498/14215102 . If you're trying to detect someone else's extension from a webpage, that's intentionally not possible. –  Feb 15 '21 at 12:03

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