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Present version is 3.0.3 downloaded 3.6.13. When trying to load the upgrade received error message -- "The operation cannot be completed because you do not have sufficient privilages for some items." --What is the solution to this ?

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The computer is

Model Name: MacBook Pro

 Model Identifier:	MacBookPro4,1
 Processor Name:	Intel Core 2 Duo
 Processor Speed:	2.4 GHz
 Number Of Processors:	1
 Total Number Of Cores:	2
 L2 Cache:	3 MB
 Memory:	2 GB
 Bus Speed:	800 MHz
The computer is Model Name: MacBook Pro Model Identifier: MacBookPro4,1 Processor Name: Intel Core 2 Duo Processor Speed: 2.4 GHz Number Of Processors: 1 Total Number Of Cores: 2 L2 Cache: 3 MB Memory: 2 GB Bus Speed: 800 MHz

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  • Download a new copy of the Firefox program: http://www.mozilla.com/firefox/all.html
  • Trash the current Firefox application to do a clean (re)install.
  • Install the new version that you have downloaded.

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