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Firefox keeps changing preferences for Portable Document Format (PDF) to Save File. I constantly have to change it back to Preview in Firefox.

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How can I resolve this issue?

How can I resolve this issue?
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It is possible that this action wasn't created for the correct content type (application/pdf).

Try to rename/remove handlers.json and delete mimeTypes.rdf when present in the Firefox profile folder with Firefox closed to reset all file actions. See also:

You can use the button on the "Help -> Troubleshooting Information" (about:support) page to go to the current Firefox profile folder or use the about:profiles page.

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Citér

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  • Shockwave Flash 32.0 r0

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  • User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:73.0) Gecko/20100101 Firefox/73.0

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Luk
Eve
  • Top 25 Contributor
  • Administrator
60 løsninger 383 svar

See if this thread's solution works for you:

https://support.mozilla.org/en-US/questions/1159121

See if this thread's solution works for you: https://support.mozilla.org/en-US/questions/1159121
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cor-el
  • Top 10 Contributor
  • Moderator
17857 løsninger 161589 svar

Valgt løsning

It is possible that this action wasn't created for the correct content type (application/pdf).

Try to rename/remove handlers.json and delete mimeTypes.rdf when present in the Firefox profile folder with Firefox closed to reset all file actions. See also:

You can use the button on the "Help -> Troubleshooting Information" (about:support) page to go to the current Firefox profile folder or use the about:profiles page.

It is possible that this action wasn't created for the correct content type (application/pdf). Try to rename/remove handlers.json and delete mimeTypes.rdf when present in the Firefox profile folder with Firefox closed to reset all file actions. See also: *https://support.mozilla.org/en-US/kb/change-firefox-behavior-when-open-file You can use the button on the "Help -> Troubleshooting Information" (about:support) page to go to the current Firefox profile folder or use the <b>about:profiles</b> page. *Help -> Troubleshooting Information -> Profile Folder/Directory:<br>Windows: Open Folder; Linux: Open Directory; Mac: Show in Finder *https://support.mozilla.org/en-US/kb/Profiles
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jscher2000
  • Top 10 Contributor
8953 løsninger 73374 svar

Hi A. Shakouri, is there a pattern to when it changes? For example, when you exit Firefox completely and start it back up again?

There are rational reasons for Firefox settings to change at startup, but changes that occur at random times are troubling and could point toward other culprits.

Also, is this on a computer managed by an IT department, or a personal system?

Hi A. Shakouri, is there a pattern to when it changes? For example, when you exit Firefox completely and start it back up again? ''There are rational reasons for Firefox settings to change at startup, but changes that occur at random times are troubling and could point toward other culprits.'' Also, is this on a computer managed by an IT department, or a personal system?
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Citér
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