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How to fix: Bad Request Your browser sent a request that this server could not understand. Reason: You're speaking plain HTTP to an SSL-enabled server port. In

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How do I fix this problem. Thank you

Bad Request

Your browser sent a request that this server could not understand. Reason: You're speaking plain HTTP to an SSL-enabled server port. Instead use the HTTPS scheme to access this URL, please.

   Hint: https://secure.blurb.com/
How do I fix this problem. Thank you Bad Request Your browser sent a request that this server could not understand. Reason: You're speaking plain HTTP to an SSL-enabled server port. Instead use the HTTPS scheme to access this URL, please. Hint: https://secure.blurb.com/

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This issue can be caused by corrupted cookies or cookies that are blocked.

Clear the cache and remove the cookies from websites that cause problems via the "3-bar" Firefox menu button (Options/Preferences).

"Clear the cache":

  • Firefox -> Preferences -> Advanced -> Network -> Cached Web Content: "Clear Now"

"Remove the cookies" from websites that cause problems.

  • Firefox -> Preferences -> Privacy -> "Use custom settings for history" -> Cookies: "Show Cookies"

If clearing cookies didn't help then it is possible that the cookies.sqlite file in the profile folder that stores the cookies got corrupted.

  • Rename/remove cookies.sqlite (cookies.sqlite.old) and if present delete cookies.sqlite-shm and cookies.sqlite-wal in the Firefox profile folder in case cookies.sqlite got corrupted.

You can use this button to go to the current Firefox profile folder:

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It's interesting that the server complains you are not using HTTPS, but you posted an HTTPS link. Do you think your HTTPS Everywhere extension might have a problem setting (exception?) related to that site?