Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Peer's Certificate has an invalid signature > Can't connect to secured site

  • 5 svar
  • 23 har dette problemet
  • 4 views
  • Siste svar av cor-el

more options

I can't access secure sites with FF 23,01, when I try I get the following message:

"Secure connection failed---Peer's Certificate has an invalid signature .......

This just started today. I have been using FF forever and have never before seen this message.

I can access the same sites with IE10 .

This started mid-morning today 8/30/13

I can't access secure sites with FF 23,01, when I try I get the following message: "Secure connection failed---Peer's Certificate has an invalid signature ....... This just started today. I have been using FF forever and have never before seen this message. I can access the same sites with IE10 . This started mid-morning today 8/30/13

All Replies (5)

more options

Please refer to this thread.

more options

Hi ComputerWhiz  :-)


Thanks for taking the time to read and reply to my issue.

Unfortunately I am not a computer whiz and I have no idea how to do the suggested fix from the thread you referred me to.

more options

That is ok. Some people are more tech savvy than others.

Unfortunately, I have never attempted the solution from the other thread.

Since the solution from that thread is not mine, I will contact cor-el and get you some more support.

I will also look into how to do this solution.

Sorry I am not able to help you directly.

more options

Hi :-)

I just decided to do a fresh clean install. Luckily(lol) my pc crashed last week and my OEM recovery discs failed and my lousy 7 month old Iomega external hard drive failed a couple of weeks ago (stay away from Iomega-lots of complaints on their forum about failed external drives) so I had to buy a new edition of Windows-reformatted--lost my moz backups in the process so I really didn't lose that much and will only take a day to recreate what I lost in FF. So consider the matter resolved :-)

Thanks again for your time.

more options

Are you using a secure https connection in IE as well?

What are the connection settings?

Check the connection settings.

If you do not need to use a proxy to connect to internet then try to select "No Proxy" if "Use the system proxy settings" or one of the others do not work properly.

See "Firefox connection settings":


Boot the computer in Windows Safe mode with network support (press F8 on the boot screen) as a test to see if that helps.