Disadvantages of IE7?

1.The loading of offline webpages is very slow when compared to opera.

2.After loading a offline webpage in one tab and on clicking another offline webpage to open it, IE gets struck down and we need to close it.

3.After Deleting the whole browsing history we can see our just typed search query is still there in the search bar.

4. The close button does not appear at the multiple tabs on same time.