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HSBC personal internet banking won't load

  • 2 replies
  • 1 has this problem
  • Last reply by cor-el

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I've been using Firefox to do my internet banking for years, but last week suddenly it doesn't work any more. I get a message saying "Bad Request Your browser sent a request that this server could not understand. Size of a request header field exceeds server limit."

Please can someone sort this out as I rely heavily on Firefox for this purpose.

Using Microsoft Edge it all works as normal, so that is my work-around, but would prefer to use Firefox if I can.

Chosen solution

Clearing cookies for that site sometimes helps with this bad requests.

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Chosen Solution

Clearing cookies for that site sometimes helps with this bad requests.


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

  • rename/remove cookies.sqlite (cookies.sqlite.old) and when present delete cookies.sqlite-shm and cookies.sqlite-wal in the Firefox profile folder with Firefox closed in case cookies.sqlite got corrupted.

You can use the button on the "Help -> More Troubleshooting Information" (about:support) page to go to the current Firefox profile folder or use the about:profiles page.


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