wont let me uninstall mozilla firefox 45.0

Repeat step 5 for each of the 3 certificates listed above.Using the “Upload local CA”, browse to and select 1 of the 3 certificates, then click upload.Disable the old “Digital Signature Trust Co.Navigate to “Web Protection”, “Filtering Options”, and “HTTPS CAs” tab.If you have a firewall that scans HTTPs traffic, you’ll need to add the two root certificates above to the HTTPS Certification authority list.Īs an example, to fix this on the Sophos UTM firewall, follow the instructions below: HTTPS Scanning/Filtering Firewall Fix (Sophos UTM as example) Also, you may need to close and reopen any software and/or browsers for it to work with the new certificate. If you’re still having issues, you can try deleting the “DST Root CA X3” certificate from your existing Root CAs. The Let’s Encrypt certificates that are used on websites that you visit and that you might have deployed on your servers should now work without any issues. You only need to add the two root certificates. You can download them by clicking the links above or go to for more information and to download if you don’t trust the above links.Īfter downloading and adding these Root CAs and the Intermediate CA to your computer or device, you should have the full certificate chain to validate the Let’s Encrypt certificates. Let’s Encrypt R3 (Or Let’s Encrypt R3 DER Format).

ISRG Root X2 (Or ISRG Root X2 DER Format).

ISRG Root X1 (Or ISRG Root X1 DER Format).

To fix this issue, you need to add the 2 new Root CAs to your computer or device. Older devices may be using the older Root CA which expired today (September 30th, 2021). However, as time has passed and the service has been used more, they now use “ISRG Root X1” and “ISRG Root X2” as Root CA’s and “Let’s Encrypt R3” as an intermediate certificate. Let’s Encrypt originally used the “DST Root CA X3” certificate to issue Let’s Encrypt certificates. In my environment, I noticed a number of issues when browsing to websites that use the free Let’s Encrypt certificates, as the Web Protection Web Filtering service on my Sophos UTM firewall would report the certificate has expired and not allow me access to the websites using it.

Some of these problematic devices include Samsung Galaxy phones, iPhones, VDI zero and thin clients, and even Sophos UTM firewalls. Today, the DST Root CA X3 certificate expired, leaving many devices on the internet having issues connecting to services and certificates that use this Root CA, including those using Let’s Encrypt certificates.

Wont let me uninstall mozilla firefox 45.0