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

Lolu chungechunge lwabekwa kunqolobane. Uyacelwa ubuze umbuzo omusha uma udinga usizo.

Firefox reports wrong pdf mime type

  • 3 uphendule
  • 3 zinale nkinga
  • 1 view
  • Igcine ukuphendulwa ngu cor-el

more options

Trying to upload pdf files from Firefox, pdf files get rejected as wrong file type, works in all other browsers. ? Thanks for your help.

Trying to upload pdf files from Firefox, pdf files get rejected as wrong file type, works in all other browsers. ? Thanks for your help.

Isisombululo esikhethiwe

Try to delete the mimeTypes.rdf file in the Firefox Profile Folder to reset all file actions.

You can also check some keys in the registry with the registry editor.

  • HKEY_CLASSES_ROOT\.pdf

You can check the linked MIME type in the MIME Database key.

  • HKEY_CLASSES_ROOT\MIME\Database\Content Type
Funda le mpendulo ngokuhambisana nalesi sihloko 👍 1

All Replies (3)

more options

Isisombululo Esikhethiwe

Try to delete the mimeTypes.rdf file in the Firefox Profile Folder to reset all file actions.

You can also check some keys in the registry with the registry editor.

  • HKEY_CLASSES_ROOT\.pdf

You can check the linked MIME type in the MIME Database key.

  • HKEY_CLASSES_ROOT\MIME\Database\Content Type

Okulungisiwe ngu cor-el

more options

THANKS, cor-el!

I just moments ago actually found a link form Googling (http://support.mozilla.org/en-US/kb/cant-download-or-save-files?redirectlocale=en-US&redirectslug=Unable+to+download+or+save+files#w_change-file-type-settings) that showed me where to find that mimeTypes.rdf file you referenced above. The fix suggested was to rename the old rdf file and restart Firefox, which was essentially your first suggestion to reset all file actions, and it worked. Thanks for your help!

more options

You're welcome