Suddenly, Firefox blocks most sites, Mozilla and Google included.
I'm in Mac OSX Sierra. No antivirus installed. Firefox is 56.0.2 since 57 gave me problems. It worked perfectly and, all of a sudden, wham! Some sites work, some others, MOZILLA.ORG and GOOGLE INCLUDED, no more. Restarted in safe mode, no way. Cleared cache. No way. Trashed the program and reinstalled in 56.0.2, no way, reinstalled in 57, no way. Erased the cert8.db files in profiles. No way, no way, no way. In some sites, I could add exception but then they open up with no images, not formatted, in a weird plain mode.
When I try google.com, it says:
Your connection is not secure The owner of www.google.com 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 may only connect to it securely. As a result, it is not possible to add an exception for this certificate. Learn more…
When I click "learn more", it goes to Mozilla but... MOZILLA IS BLOCKED TOO! I open the same page in Safari but just say to fix the antivirus and I have no antivirus.
I click the "advanced" tag and this is what shows up:
www.google.com uses an invalid security certificate. The certificate is not trusted because the issuer certificate is unknown. The server might not be sending the appropriate intermediate certificates. An additional root certificate may need to be imported. Error code: SEC_ERROR_UNKNOWN_ISSUER
I click the SEC_ERROR and there's another window saying "copy text to clipboard" and... ok, I'm an idiot but I don't know what's the clipboard and where's it. Anyway, the text is this:
https://www.google.com/ Peer’s Certificate issuer is not recognized. HTTP Strict Transport Security: true HTTP Public Key Pinning: true Certificate chain:
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That's all folks. I'm lost. Firefox has been my favorite in years and now... I'm stuck. Thanks in advance for your help.
Additional System Details
- User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/604.3.5 (KHTML, like Gecko) Version/11.0.1 Safari/604.3.5
Thank you for the certificate chain. The Issuer of the site certificate is listed as applian.com which makes Freecorder and Replay Media Catcher. These programs intercept your browser connections and in order to decode the secure sites, they present fake certificates to Firefox. Do you have that software?
If you trust the program to read all your Firefox browsing traffic, you probably can set up Firefox to trust its fake certificates. If not, perhaps you can configure the program not to intercept your Firefox connections.
Thanks so much Jscher for your reply.
First of all, I tell you that I woke up this morning (I'm in Europe) and Firefox is working again flawlessly. All ok. All perfect. Same sites blocked last night are now running with no apparent trouble. But, of course, I'd like to have my guns ready in case the villain comes back...
About applian.com: you say a program from their bundle steps in between me and my connections (google or the same firefox). Problem is... I don't have that software on my machine! Maybe, not sure at all, I visited their site once but never downloaded any program, never tried it for free. I use videodownloadhelper add-on instead. How comes they intrude in my system like that? Is there a trojan in my Mac?
And one last question, if I may. What does it mean "copy text to clipboard"? I know how to copy and paste, of course, but I have no clue about what the clipboard is and where it is.
Thanks for your help and patience. Have a great day
Maybe, safer to check than not : Please use more than 1 scanner as each uses diff tech : https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-caused-malware Save your Report and google each before deleting anything as do not want to delete something you need, If need help : https://forums.malwarebytes.com/topic/9573-im-infected-what-do-i-do-now/ Post in only 1 forum, then wait.
Please let us know if this solved your issue or if need further assistance.