Error 15
For weeks I have been trying to find a solution to getting "Error 15" on certain websites when using Firefox. Opera and Edge have no problems with those sites, only Firefox has problems. I have tried every "fix" that I can find on the Mozilla site and none of them work. Is there anything else I should try before I abandon Firefox? Could it be that Firefox is now unreliable under Win7 Pro 64-bit? If so I will have to abandon it because this computer cannot run Win10 or later.
All Replies (7)
The most crucial site is https://americanancestors.org. The error window is:
This article may help.
https://appuals.com/fix-error-code-15-this-request-was-blocked-by-the-security-rules/
Dropa said
So did you verify if this problem was there in Private Mode window browsing as well?
I did.
Terry said
This article may help.
I have tried everything in that article except using a VPN, which I cannot afford to pay for. As I stated earlier this is a browser-specific problem - it does not occur in Edge or Opera.
Dropa said
It opens just fine on firefox for me.
I apparently did not state the problem clearly - I can access the site but cannot log into it - I get the error agter the site processes my login. I have to use Edge or Opera to log in.
Try troubleshooting.
https://support.mozilla.org/en-US/kb/diagnose-firefox-issues-using-troubleshoot-mode https://support.mozilla.org/en-US/kb/troubleshoot-extensions-themes-to-fix-problems (also deals with hardware acceleration)
You can check for issues with Total Cookie Protection.