Chrome Extension - Display Popup on Mouse Over

Both browserActions and pageActions let you display a popup when certain events happen (e.g button click). How开发者_如何转开发 can I display a popup when I mouse over some content on the page (e.g. a hyperlink)?

Cheers,

{ete

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I think you can't, but you can try to load your popup (chrome.extension.getURL("popup.html")) in an iframe on page