Where did you install Firefox from? Help Mozilla uncover 3rd party websites that offer problematic Firefox installation by taking part in our campaign. There will be swag, and you'll be featured in our blog if you manage to report at least 10 valid reports!

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

PDF's keep opening in Firefox, even though I set the Action to "Always ask" for application/pdf content type. why?

  • No replies
  • 3 have this problem
  • 5 views
more options

Tools -> Options -> Applications

I have Action set to: Always Ask for content type: application/pdf

When I send a valid pdf with the http header: Content-type: application/pdf

I expect to be asked if I want to download the file or open it. The file opens in the browser without asking me.

Interestingly, if I send a corrupted pdf, I get the option.

In Adobe Reader X, I have changed: Edit -> Preferences -> Internet

so that all settings regarding the web browser are unchecked (including "Display PDF in browser").

Tools -> Options -> Applications I have Action set to: Always Ask for content type: application/pdf When I send a valid pdf with the http header: Content-type: application/pdf I expect to be asked if I want to download the file or open it. The file opens in the browser without asking me. Interestingly, if I send a corrupted pdf, I get the option. In Adobe Reader X, I have changed: Edit -> Preferences -> Internet so that all settings regarding the web browser are unchecked (including "Display PDF in browser").