Cerca nel supporto

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

Questa discussione è archiviata. Inserire una nuova richiesta se occorre aiuto.

Firefox has changed all my Adobe PDFs to Firefox HTML Documents!

  • 3 risposte
  • 32 hanno questo problema
  • 2048 visualizzazioni
  • Ultima risposta di pmkap

more options

I was having trouble opening up new pdfs -- Firefox would start opening up multiple tabs until I closed firefox -- and then I realized that (a) it did the same for opening existing pdfs, and (b) it had changed the file type on all my existing pdfs to Firefox HTML documents. Quite disturbing. Adobe Acrobat and Firefox are both up-to-date...what can I do to restore proper settings?

Tutte le risposte (3)

more options

You can rename (or delete) the mimeTypes.rdf file in the Firefox profile folder to reset all file actions.

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

more options

Way beyond my technical abilities. How/why did Firefox suddenly make these changes, and isn't there any easy way to undo?

more options


Your suggestions didn't work. But the solution to this problem is found - https://support.mozilla.org/en-US/questions/1012877?esab=a&s=pdfs+become+firefox+html&r=11&as=s

The chosen solution works. All you need to do is apply (in my case in windows explorer on an acient XP machine) it to one pdf file that has been changed to a firefox html file, and it will change ALL the corrupted PDF files back to PDFs. It will leave those files that actually are HTML files alone. FWIW