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when i'm on the network at our office i can't access any of the mozilla websites, i get an error 13. Any idea whey Mozilla has blocked our network?

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when i'm on the network at our office i can't access any of the mozilla websites, i get an error 13. Any idea whey Mozilla has blocked our network?

when i'm on the network at our office i can't access any of the mozilla websites, i get an error 13. Any idea whey Mozilla has blocked our network?

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I haven't heard of error 13. Might your office have a proxy server that is affecting your access?