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Disable file protocal in Firefox

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I have Firefox on my Citrix servers and I want to block access to C:\ on the server, or disable the file protocol . We are running verion 26 and higer

I have Firefox on my Citrix servers and I want to block access to C:\ on the server, or disable the file protocol . We are running verion 26 and higer

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hello, maybe this can help?: http://mike.kaply.com/2014/09/23/fileblock/