My old version of Firefox (45) has no problem with security certificates, but new version (59) cannot see google cert and will not allow me to add an exception.
My older Firefox 45.7.0 has no problems with https certificates. I am running this on Linux CentOS 7. I recently downloaded the updated Firefox 59 and ran it. But it cannot run https. It keeps giving me the Connection is not secure (SEC_ERROR_UNKNOWN_ISSUER) error for every https site. And when I click the Advanced button, it does not have a button to allow me to add a security exception.
I added our company network proxy, specifically, even though it is set at the system level, just to see if that helped, but no luck.
I can't get to any https search engine (google, duckduckgo, etc.). Please help.
Additional System Details
- Adobe PDF Plug-In For Firefox and Netscape 15.6.30413
- A plugin to detect whether the Adobe Application Manager is installed on this machine.
- NPRuntime Script Plug-in Library for Java(TM) Deploy
- Next Generation Java Plug-in 11.161.2 for Mozilla browsers
- The plugin allows you to have a better experience with Microsoft SharePoint
- The plugin allows you to have a better experience with Microsoft Lync
- NVIDIA 3D Vision Streaming plugin for Mozilla browsers
- NVIDIA 3D Vision plugin for Mozilla browsers
- Shockwave Flash 29.0 r0
- User Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Firefox/52.0
Hi, please try a Refresh but Note that this does more than uninstalling and re-installing does. Normal uninstalling does not remove some preferences which may have become corrupt. Please Refresh but do this 1st: Delete your Cookies and Cache and TEST.
TEST....... If no issues then Extensions which need to be added back in 1 at a time and tested ..... Or it is your Profile : Make a new one and test ...:
If is your Profile :
Note: Any customization will revert back to default, you will also need to reinstall Extensions.
Please let us know if this solved your issue or if need further assistance.