After updating my Firefox, I could not open several sites, including Google.com, Twitter.com, Facebook.com, etc. I received the error – Your Connection is not ...

Hello, I recently installed Zen browser and ran into a TLS error connecting to accounts.microsoft.com. Zen does not believe the cert is valid due to Error code: SEC ...

I'm trying to access the website of a portuguese delivery company to track an order (https://tracking.dpd.pt/track-and-trace), but I'm getting an unknown certificate ...

When browsing the Web, sometimes you might encounter a sec_error_bad_signature error in Firefox. This issue will prevent you from visiting certain websites, so let ...

Mozilla has halted the automatic updates to Firefox 65 as users are unable to browse web sites due to certificate errors. These errors are being caused by conflicts between various antivirus program's ...