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No longer able to set PDF to display in browser

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At some point in the past 4-7 months (after a previous update), I am no longer able to open PDFs within a tab on the browser; it always asks me to download the file and either save it or open it in Preview (I'm running Mac OS 10.13.6). I've tried changing the settings in Preferences>General>Applications, but I see the attached, which leaves no option for "Open in firefox". Am I missing something? Is it still possible to open PDFs in Firefox?

My firefox version appears to be 60.6.2esr (64-bit). I am not allowed to perform my own firefox updates, which are controlled by my sysadmin... however I am able to add plug-ins. I suspect perhaps I am missing one.

At some point in the past 4-7 months (after a previous update), I am no longer able to open PDFs within a tab on the browser; it always asks me to download the file and either save it or open it in Preview (I'm running Mac OS 10.13.6). I've tried changing the settings in Preferences>General>Applications, but I see the attached, which leaves no option for "Open in firefox". Am I missing something? Is it still possible to open PDFs in Firefox? My firefox version appears to be 60.6.2esr (64-bit). I am not allowed to perform my own firefox updates, which are controlled by my sysadmin... however I am able to add plug-ins. I suspect perhaps I am missing one.
Attached screenshots

Chosen solution

The missing setting is usually labeled Preview in Firefox. See: View PDF files in Firefox.

For some reason, your IT doesn't want you to use the built-in PDF viewer. It seems they have implemented the "DisableBuiltinPDFViewer" policy on your installation of Firefox. I couldn't tell you why.

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Additional System Details

Installed Plug-ins

  • Shockwave Flash 32.0 r0

Application

  • User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.13; rv:60.0) Gecko/20100101 Firefox/60.0

More Information

jscher2000
  • Top 10 Contributor
8320 solutions 68108 answers

Chosen Solution

The missing setting is usually labeled Preview in Firefox. See: View PDF files in Firefox.

For some reason, your IT doesn't want you to use the built-in PDF viewer. It seems they have implemented the "DisableBuiltinPDFViewer" policy on your installation of Firefox. I couldn't tell you why.

The missing setting is usually labeled Preview in Firefox. See: [[View PDF files in Firefox]]. For some reason, your IT doesn't want you to use the built-in PDF viewer. It seems they have implemented the "DisableBuiltinPDFViewer" policy on your installation of Firefox. I couldn't tell you why.
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Question owner

Thanks. I suspected it might be controlled by my IT. I will pass along the complaint to them :).

Thanks. I suspected it might be controlled by my IT. I will pass along the complaint to them :).
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