Summary of Key Differences

Key Differences Chrome 7 Firefox 3.6 / 4.0 Beta 6 Internet Explorer 8 / 9 Beta Opera 10.6 Safari 5
Can be persistently configured to clear all browsing data Limited Yes Yes Limited Limited
Can delete the browsing history for a specific site No Sub-domain level No No No
Referring URL can be disabled No No No Yes No
Privacy mode can be set to automatically start when browser is launched No Yes No No No
Third-party cookie default setting Allowed Allowed Allowed Allowed Disabled
Blocking third-party cookies / accepting cookies only from site visited prevents acceptance of third-party cookies Yes Yes Yes No Yes
Blocking third-party cookies / accepting cookies only from the site visited prevents first-party cookies from being used later as a third-party cookie No Yes No No No
Controls for DOM storage settings
  • Allow
  • Disable
  • Prompt
  • Session only
No
  • Allow
  • Disable
  • Allow
  • Disable
  • Prompt
No
Controls for other local storage No No No No No
Provides a geolocation indicator Yes No NA1 Yes No
Centralized management of geolocation permissions Yes No NA No No

1Geolocation privacy controls are not applicable to Internet Explorer 8 and 9 Beta because they do not support geolocation service.

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