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Many sites not loading due to PR_END_OF_FILE_ERROR

For some time now - two or three weeks - I experience R_END_OF_FILE_ERROR on many websites. It is only under Firefox. And not on all sites. One example is coronavirus.bg.… (ulteriori informazioni)

For some time now - two or three weeks - I experience R_END_OF_FILE_ERROR on many websites. It is only under Firefox. And not on all sites. One example is coronavirus.bg. I can't open it under Firefox. I use Firefox v.75 on Windows 7. I tried:

  • checking TLS settings - screenshot attached. Seems fine.
  • clearing the cache; didn't help.
  • turning network.dns.disableIPv6 to 'true'; didn't help.
  • turning network.dns.disablePrefetch to 'true'; didn't help.
  • restarting Firefox with add-ons disabled; didn't help.
  • scanning for malware; Malwarebytes didn't find any.

I am also attaching my browser test results from ssllabs.com.

I honestly don't know what to do and what is the issue. Please advise.

Asked by radi.stoyanov 2 mesi fa

Answered by radi.stoyanov 2 mesi fa