Chrome extension: Using Inline Installation does not give success/failure callbacks -

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i able install chrome extension using 'inline installation method', webpage. not getting success/ failure callbacks. page has link extension in head section of page , code follows

  chrome.webstore.install('url extension', function () {         //  success!         console.log('success!');     }, function (err) {         //  error :(         console.log('failed!');     });


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