I'm trying to install addons with Firefox and it keeps giving me this.I've tried different versions of the browser and now I'm using the latest beta and I'm still getting this.Any suggestions? Your connection is not secure The owner of addons.cdn.mozilla.net has configured their website improperly. To protect your information from being stolen, Firefox has not connected to this website. This site uses HTTP Strict Transport Security (HSTS) to specify that Firefox only connect to it securely. As a result, it is not possible to add an exception for this certificate.
Eset Security with Malwarebytes on demand on Win10.Adguard 6.I tried it with these all disabled as well.
I know ESET has ssl scanning and wonder if it could be similar to this since it is affecting each version of the browser. https://support.mozilla.org/en-US/questions/1076742
Try the safe mode in Firefox and see if it still occurs. https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe-mode
I get 403 with Mozilla and Chrome browsers. Oh look... Both isitdownrightnow.com and downforeveryoneorjustme.com report problems.
its an ssl issue with some inserted certificate from some security software - if not eset then uninstall the others and check again.
Iv seen this happen with adguard try this https://kb.adguard.com/index.php?/Knowledgebase/Article/View/21/10/the-connection-is-not-trusted
