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Firefox security warning when downloading PDFs: How do I disable this?

  • 22 replies
  • 1 has this problem
  • Last reply by Kiki

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Hi. Starting somewhat recently, Firefox has been getting in the way of me downloading certain PDFs which I know to be fine but which it thinks are insecure or a security hazard. I'd like to disable this security "feature" permanently. How can I do this? Thanks!

Chosen solution

Hi Kiki. Thanks again for the response.

Since I personally can't stand the thought that a solution can't be found on this website, I will report that I've found the solution at:

Simply, one goes to about:config and sets block_download_insecure to false. Easy.

Folks who are considering doing that, however, should know that they're taking the guard off the table saw. It *can* now hurt you, so do this disabling at your own considerable risk. The goals of this protection are noble and worth pursuing, but there are still issues.

While I struggled with this, I discovered that most of the issues I encountered arose because of mis-configured websites that sent downloads over unsecured channels. Webmasters really need to get their acts together to fix this silly ridiculousness. It opens everyone up to a security issue which is potentially VERY damaging.

Thank you again, Kiki and others, for bothering to respond.

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Hi Andmagdo,

I tried that earlier, actually, and found it didn't work for me, hence the about:config solution. I'm not sure why that's the case. Thanks for the reply.


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Thank you again, Kiki and others, for bothering to respond.

No problem. Thanks also for andmagdo for the additional trick for this issue.


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