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I keep getting "Network Protocol Error" despite emptying the cache as recommended. I am running WIN10 on a HP desktop PC

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  • 1 has this problem
  • Last reply by philipp

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I have emptied the cache as advised a number ot times but the error message persists. It is also accompanied by cannot find the server message. I am running WIN10 on a devolo network with BT as ISP.

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What site are you connecting to? Also this sounds more like Windows O/S issue not related to the Browser.

Modified by WestEnd

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hi geoff, there are a couple of similar other user reports, so we are looking into the issue in

are you able to trigger the error message somewhat reliably with particular steps? if so, could you please capture a http log while the problem is occurring which would help mozilla's developers understand what's going on and how to fix it:

(it would probably best if you upload the log via and send me a private message here on the support site with the link you've received there )