So slow since few days

For the last 3 or 4 days, the connection is very slow with NextDNS activated. I tested by deactivating NextDNS and it is faster. What is the reason for this?

Here is the report I made: https://nextdns.io/diag/1a6b4050-4458-11ec-8d8f-f3ed7980806d


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  • Based on your diag, your latency is pretty low. Do you have specific example of slowness?

  • I did some tests, and the slowness was only occurring in Firefox, not in Safari.
    So I made a new installation of Firefox, uninstalled the NextDns application and configured IPV6 in the system configuration of macOS Catalina. Still the same problem...
    whereas before everything was fine, and I didn't change anything in the meantime. That's strange...

    • Kirov did you check you don’t have another doh service configure in firefox settings?

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      • DynamicNotSlow
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      • DynamicNotSlow
      • 7 mths ago
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      Kirov just stay with Safari. It’s better in all cases and Firefox doesn’t provide you any advantages but problems like that as it’s not optimised. 

  • Could be related to the network bugs pre-Monterey. Apple fixed something in Monterey that previously made any other browser than Safari slow when using DNS that blocks domains via But I think that was mostly an issue on Big Sur when users had another network extension installed, like Little Snitch. Not sure about Catalina. 

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  • 7 mths agoLast active
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