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USPS issue

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I can log in to USPS but when Firefox sends a request to the USPS server, I get a BAD REQUEST return. See image.

I did not have this problem up until about a month ago.

Currently running the latest update of Firefox.

Thank you

I can log in to USPS but when Firefox sends a request to the USPS server, I get a BAD REQUEST return. See image. I did not have this problem up until about a month ago. Currently running the latest update of Firefox. Thank you
Attached screenshots

All Replies (3)

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Also, the USPS really doesn't like VPN's

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Addons...image

Addons have not changed before this began occurring. USPS is the only server that I regularly use that has this issue.

I don't use a VPN service, our internet is too slow as it is.

Thank you

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Dropa said

Disable all of them and try agian. I never had issue just going to USPS. I think your blocker are the issue here.

I agree.

You may need to disable them and restart Firefox - similar to Troubleshooting Mode