Proxy Error
   The proxy server received an invalid response from an upstream server.
   The proxy server could not handle the request GET /pks/lookup.

   Reason: Error reading from remote server

Hello, I want to download non-stub firefox installer: http://download-installer.cdn.mozilla.net/pub/firefox/releases/92.0b9/win64/en-US/ I understand the signing gpg key is: https://download-installer.cdn.mozilla.net/pub/firefox/releases/92.0b9/KEY which has: '''first line:''' mQINBFWpQAQBEAC+9wVlwGLy8ILCybLesuB3KkHHK+Yt1F1PJaI30X448ttGzxCz '''last 2 lines:''' IxxNj5bPAQy6dRKB1TxlWr4X0pUWxuqBeObPoHS9j0ysxKPruw== =81zK I have been unable to verify the gpg key either through gpg4win or http directories: with gpg4win I get the error: PS C:\> gpg --auto-key-locate nodefault,wkd --locate-keys release@mozilla.org gpg: WARNING: unacceptable HTTP redirect from server was cleaned up gpg: error retrieving 'release@mozilla.org' via WKD: Syntax error in URI gpg: error reading key: Syntax error in URI @keys.openpgp.org entry https://keys.openpgp.org/vks/v1/by-fingerprint/14F26682D0916CDD81E37B6D61B7B526D98F0353 which has '''first line:''' xsFNBFWpQAQBEAC+9wVlwGLy8ILCybLesuB3KkHHK+Yt1F1PJaI30X448ttGzxCz '''last 2 lines:''' yf0CCuL/UQTRrW0SrKOV/RZHuvdpVYK3YIAyd49kKjLk6O9awFQy7cXq3PhjatBi =Uufg @https://pgp.mit.edu I got entry https://pgp.mit.edu/pks/lookup?op=get&fingerprint=on&search=0x61B7B526D98F0353 I got entry: '''first line:''' mQINBFWpQAQBEAC+9wVlwGLy8ILCybLesuB3KkHHK+Yt1F1PJaI30X448ttGzxCzPQpH6BoA '''last 2 lines:''' QKVzkslJWv5f71Fg3CU6fiSJDMqy1W2X+p+kOjDpCwaYD0nu/xW30kSDTnZERxlmYA== =PqfZ And now, searching https://pgp.mit.edu for release@mozilla.org or releases@mozilla.org returns: '''Proxy Error''' The proxy server received an invalid response from an upstream server. The proxy server could not handle the request GET /pks/lookup. Reason: Error reading from remote server Could I get some feedback? Txs