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  • 1 has this problem
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  • Last reply by gbzrope

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Firefox has started to default to HTTPS even when the site is HTTP In particular I can no longer log in to my D-Link router on 192.16.0.1 because it forces to HTTPS and gives:

An error occurred during a connection to 192.168.0.1. Certificate key usage inadequate for attempted operation.

Error code: SEC_ERROR_INADEQUATE_KEY_USAGE

Firefox has started to default to HTTPS even when the site is HTTP In particular I can no longer log in to my D-Link router on 192.16.0.1 because it forces to HTTPS and gives: An error occurred during a connection to 192.168.0.1. Certificate key usage inadequate for attempted operation. Error code: SEC_ERROR_INADEQUATE_KEY_USAGE

Chosen solution

I can still log into my router with Firefox 88.0.1. Is Firefox perhaps set to use 'HTTPS-Only'? See the bottom of the Privacy & Security page in Options.

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Chosen Solution

I can still log into my router with Firefox 88.0.1. Is Firefox perhaps set to use 'HTTPS-Only'? See the bottom of the Privacy & Security page in Options.

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I simply closed FF and restarted it and it worked fine.......