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Many sites not loading due to PR_END_OF_FILE_ERROR

  • 7 replies
  • 1 has this problem
  • 355 views
  • Last reply by FredMcD

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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.

Attached screenshots

Chosen solution

OK, I 'solved' the issue myself. Turns out the option DNS over HTTPS is what caused the problem. Although I don't really understand why.

Read this answer in context 👍 0

All Replies (7)

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https://www.bing.com/search?q=pr_end_of_file_error

jamesafuf123 said https://support.mozilla.org/en-US/questions/1264659#answer-1237475 my ISP was blocking sites like that

cor-el said This usually means that Firefox wasn't able to find a cipher suites to use to connect to this server and reached the end of the list. There can be two possibilities: one is that the server is outdated and doesn't support modern cipher suites, another might be that the server only supports a few cipher suites and Firefox doesn't support any of these.

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Thank you FredMcD. I have few more questions:

FredMcD said

https://www.bing.com/search?q=pr_end_of_file_error

Here you are giving me an entire search result. Which specific link are you pointing out to me?

FredMcD said

jamesafuf123 said https://support.mozilla.org/en-US/questions/1264659#answer-1237475 my ISP was blocking sites like that

It is obviously not my ISP since other browsers do open these same websites. I already stated that in my initial post.

FredMcD said

cor-el said This usually means that Firefox wasn't able to find a cipher suites to use to connect to this server and reached the end of the list. There can be two possibilities: one is that the server is outdated and doesn't support modern cipher suites, another might be that the server only supports a few cipher suites and Firefox doesn't support any of these.

That would be quite unpleasant. Can you open this website that I gave as an example? And which Firefox version are you using?

Modified by radi.stoyanov

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I post the search link so that one can look them up. I also posted others attempts to solve the problem.

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Thanks. Unfortunately my issue persists and I already went through the obvious answers.

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I called for more help.

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Chosen Solution

OK, I 'solved' the issue myself. Turns out the option DNS over HTTPS is what caused the problem. Although I don't really understand why.

Modified by radi.stoyanov

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That was very good work. Well Done. Please flag your last post as Solved Problem as this can help others with similar problems.