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Firefox Recognizing All PDFs as ZIP files

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

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I've never encountered this problem before... I am using a new computer but have used firefox exclusively for decades.

Every time i try to read a PDF, Firefox recognizes it as a .zip file, which it clearly isn't. I can't even choose acrobat reader as an option to open the files. If i manually go to the downloads tap and click on the file there, it immediately opens as a pdf in reader. What on earth is going on?

I've never encountered this problem before... I am using a new computer but have used firefox exclusively for decades. Every time i try to read a PDF, Firefox recognizes it as a .zip file, which it clearly isn't. I can't even choose acrobat reader as an option to open the files. If i manually go to the downloads tap and click on the file there, it immediately opens as a pdf in reader. What on earth is going on?
Attached screenshots

All Replies (2)

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Just to verify, can you show what you have set here as the default app for pdf? see screenshot

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You can look at this extension.

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