Where did you install Firefox from? Help Mozilla uncover 3rd party websites that offer problematic Firefox installation by taking part in our campaign. There will be swag, and you'll be featured in our blog if you manage to report at least 10 valid reports!

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

Cannot connect to ANY websites.

more options

On Mac with Catalina 10.15.3

When I try to use Firefox 72.0.2 I cannot connect to ANY website. I just get an error message that says:

Secure Connection Failed.

An error occured during a connection to website.com PR_END_OF_FILE_ERROR

On Mac with Catalina 10.15.3 When I try to use Firefox 72.0.2 I cannot connect to ANY website. I just get an error message that says: Secure Connection Failed. An error occured during a connection to website.com PR_END_OF_FILE_ERROR

All Replies (1)

more options

Hi dave.kydd, I assume non-secure connections are okay? For example:

http://www.example.com/

The PR at the beginning of PR_END_OF_FILE_ERROR usually refers to a proxy or "man in the middle" of your browsing connections. That might be a security software filter or something else. Sometimes it is a problem with a VPN.

Does anything in the support article help with tracking it down: Secure connection failed and Firefox did not connect.