Depending on the IE tab version, here are the methods implemented for window.external feature :
| | IE5.5 | IE6 | IE7 | IE8 |
|---|
| AddChannel | Yes | Yes | No | No |
| AddFavorite | Yes | Yes | Yes | Yes |
| AddDesktopComponent | Yes | Yes | Yes | Yes |
| AddSearchProvider | No | No | Yes | Yes |
| AddToFavoritesBar | No | No | No | Yes |
| AutoCompleteSaveForm | Yes | Yes | Yes | Yes |
| AutoScan | Yes | Yes | Yes | Yes |
| ContentDiscoveryReset | No | No | No | Yes |
| ImportExportFavorites | Yes | Yes | Yes | No |
| InPrivateFilteringEnabled | No | No | No | Yes |
| IsSearchProviderInstalled | No | No | Yes | Yes |
| IsServiceInstalled | Yes | No | No | No |
| IsSubscribed | Yes | Yes | No | No |
| NavigateAndFind | Yes | Yes | Yes | Yes |
| ShowBrowserUI | Yes | Yes | Yes | Yes |
The methods are present, implemented, but the implementation is doing nothing and is just opening a message box.
