SessionStorage is shared incorrectly and Internet Explorer 11 becomes slow when you create WebBrowser controls


Symptoms


Consider the following scenario:

  • You use an application that creates WebBrowser controls. 
  • The application uses a SessionStorage object to store sessions in Internet Explorer 11.
In this scenario, you encounter the following issues:

  • When the application creates a control in a separate thread (such as create a new tab), the data of the SessionStorage object is shared incorrectly.

    Note This issue also occurs when the application creates a control on a same thread. See article KB3012780 for more information.
  • When the application creates controls repeatedly, the performance of Internet Explorer becomes slow.

Resolution


Update information

To resolve this issue, install the most recent cumulative security update for Internet Explorer. To do this, go to Microsoft Update.

For technical information about the most recent cumulative security update for Internet Explorer, go to the following Microsoft website:Note This update was first included in security update 2975687.

For more information about security update 2975687 , click the following article number to view the article in the Microsoft Knowledge Base:

2975687  MS14-037: Cumulative security update for Internet Explorer: July 8, 2014

Status


Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

References


See the terminology that Microsoft uses to describe software updates.