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Cannot complete upgrade to Firefox 4 - "The operation cannot be completed because you do not have sufficient privileges for some of the items"- what is the problem?

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I currently have Firefox 3.0.5 installed on my MacBook (10.5.8). I can download FF4 but when I try to complete the installation by dragging the FF icon into the folder I get the above message. Thanks.

I currently have Firefox 3.0.5 installed on my MacBook (10.5.8). I can download FF4 but when I try to complete the installation by dragging the FF icon into the folder I get the above message. Thanks.

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  • Trash the current Firefox application to do a clean (re-)install.
  • Install the new version that you have downloaded.

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