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Appendix 3: Internet Explorer 6 to Internet Explorer 8 Browser Changes

Updated: August 25, 2010

Applies To: Windows 7

 

  Design Changes from Internet Explorer 6 to Internet Explorer 7 Design Changes from Internet Explorer 7 to Internet Explorer 8

Internet Explorer Versioning

  • When a long user agent (UA) string encounters a server that accepts shorter UA string only, the user will be presented with an error page

  • Internet Explorer 8 Compatibility View mode, turned on by default for intranet sites in Internet Explorer 8, actually sends an Internet Explorer 7 user agent string; to differentiate between Internet Explorer 7 and Compatibility View, look for the newTrident token

noteNote

 

  Design Changes from Internet Explorer 6 to Internet Explorer 7 Design Changes from Internet Explorer 7 to Internet Explorer 8

Standards Compliance Updates

Applies to Internet Explorer 7 Standards or “Strict” mode and above:

Applies to Internet Explorer 8 Standards mode and above:

noteNote

 

  Design Changes from Internet Explorer 6 to Internet Explorer 7 Design Changes from Internet Explorer 7 to Internet Explorer 8

Security Improvements

  • Apply regardless of document mode

  • Security features can be turned off using Group Policy

Architectural Changes

  • Apply regardless of document or compatibility mode

  • Protected Mode Update: Intranet now runs in medium (instead of low) integrity level by default

  • Loosely Coupled IE may block add-ons (that is, ActiveX controls and COM objects) that: 1) Use windows hierarchy techniques to locate UI frame and tab windows (which now run in separate processes at different integrity levels), 2) Create a subclass of the UI frame (now at medium integrity level) from a low-integrity tab process, 3) Use unsupported messaging techniques between UI frame and tabs

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