[Mozilla Enterprise] Policy 'DisableBuiltinPDFViewer' disables the pdf file handler

[Dimas Streich (Informàtica Trueta)]

El 22/10/2020 a les 21:17, Mike Kaply ha escrit:
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>>     On Mon, Oct 19, 2020 at 11:54 AM Dimas Streich (Informàtica Trueta) <dstreich.girona.ics at gencat.cat <mailto:dstreich.girona.ics at gencat.cat>> wrote:
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>>         Hi,
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>>         We've problems with some PDFs and the Firefox pdfjs implementation and we need to disable it. If we set the policy 'DisableBuiltinPDFViewer' to true the PDF handler disappears inside Options > General > Applications, so we can't use the Adobe connector to visualize it and the user is forced to download or open the PDF.
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>>     What is the Adobe connector? If the PDF isn't viewed within Firefox using our viewer, open or download would be the only other choices. There's no way to route it to Firefox (because there is no Acrobat/PDF plugin)
>     You're right, the Adobe connector doesn't work with Firefox 64bits. But is it normal that the PDF handler disappears and user can't opt to ask or open forever, or use the external reader (Adobe Reader) for default?
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> What are you getting when you open a PDF? You should still get the helper dialog and the user can make a choice what to do with that PDF. If you disabled pdfjs, Firefox at that point doesn't know what to do with PDFs.
> There are cases when PDFs are sent with the wrong mime type and we can't handle them properly.
Understood. I will investigate more, I was just surprised by not finding PDF in the application list.
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>     By the way, a noob question: is it possible to reset or change a user preference with policies with Firefox 68 ESR? I've seen the new Preferences policy in 78.3, it's very interesting but we can't use it yet. But anyway it don't support pdfjs.* preferences? :-(
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> Are there some specific preferences you want? I can just add pdfjs to the list.
Yes please! In this case we will use autoconfig but in a near future we'd like to get rid of it.
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>     For some reason we changed DisableBuiltinPDFViewer to false but many users still have pdfjs.disabled to true. The only way to change it is using the autoconfig pref()?
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> You can definitely clear the pref using autoconfig - *clearPref(prefName)*
Perfect, thx
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>     PD. One of the problems with the Firefox pdfjs is that it don't show the digital signatures. Do you know if it will be solved soon?
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> I don't have an answer to that one. It hasn't come up before. I'll mention it to the PDF folks. FYI, the issue is:
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> https://github.com/mozilla/pdf.js/issues/1076 <https://github.com/mozilla/pdf.js/issues/1076>
Nice! I hope it can be fixed soon, at time for future 78 ESR... or at least 88 ESR.
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> Mike

-- 

*Dimas Streich i Colomeda
* Unitat de Tecnologies de la Informació i Comunicació
Hospital Universitari de Girona Doctor Josep Trueta
Institut Català de la Salut Girona
Departament de Salut | Generalitat de Catalunya
Av.França s/n | 17007 Girona
dstreich.girona.ics at gencat.cat <mailto:dstreich.girona.ics at gencat.cat> | http://www.hospitaltrueta.cat <http://www.hospitaltrueta.cat>
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