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New Install gettign PR_CONNECT_RESEt_ERROR on all sites

Firefox Webové certifikáty
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kevin.landon
kevin.landon

brand new Dell Pro 14 Plus laptops (PB14250), Initial install of OS,(Win 11 Enterprise, v 26200 25H2). All updates from Dell and Microsoft. Laptop is domain joined, on a hardline network connection. Only other browser is Edge, and has no issues. Installed fresh install of Firefox x64 (v153.0) to machine. ALL SITES attempted return this error. Google, Amazon, even trying to get to the support.mozilla.org return this error. In lower left while trying, the messages relating to the TLS handshake being performed can be seen. Disabled Proxy, restarted and no change. Disabled enterprise root certificate, restarted and no change Uninstalled, power cycled Laptop, reinstalled, power cycled, no change Issue is not preset at all with Edge. User needs Firefox as a specific critical vendor only supports Firefox for their portal.

brand new Dell Pro 14 Plus laptops (PB14250), Initial install of OS,(Win 11 Enterprise, v 26200 25H2). All updates from Dell and Microsoft. Laptop is domain joined, on a hardline network connection. Only other browser is Edge, and has no issues. Installed fresh install of Firefox x64 (v153.0) to machine. ALL SITES attempted return this error. Google, Amazon, even trying to get to the support.mozilla.org return this error. In lower left while trying, the messages relating to the TLS handshake being performed can be seen. Disabled Proxy, restarted and no change. Disabled enterprise root certificate, restarted and no change Uninstalled, power cycled Laptop, reinstalled, power cycled, no change Issue is not preset at all with Edge. User needs Firefox as a specific critical vendor only supports Firefox for their portal.

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jbr
jbr
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If you open about:networking it will probably show all the connections it's attempting and what results that yields.

My guess is firefox.exe is not allowlisted to open outbound connections through a firewall or something similar.

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