Get current page URL from a firefox sidebar extension
I'm writing a sidebar extension for Firefox and need a way to get the URL of the current page so I can check it against a database and display the results. How can I do this? window.top.getBrowser().selectedBrowser.contentWindow.location.href; might work, otherwise I think you need to use: var mainWindow = window.QueryInterface(Components.interfaces.nsIInterfaceRequestor) .getInterface(Components.interfaces.nsIWebNavigation) .QueryInterface(Components.interfaces.nsIDocShellTreeItem) .rootTreeItem .QueryInterface(Components.interfaces.nsIInterfaceRequestor) .getInterface(Components.interfaces