Firefox refuses to open pdf's and just wants to save them SOLVED

[jmm]

Hello,
Using Firefox, I normally open online pdf's with PDF-XChange Editor. This doesn't work anymore. Now, when I click on the pdf link, FF only offers to save the file, even though my Application Preference for pdf's (in about:preferences) is still set to "Use PDF-XChange Editor". This issue seems to have started after a friend of mine used my machine to open his webmail and downloaded a pdf. I have restored my system to a previous date with no success, so it may seem that the registry was not modified. I also tried to set my Application Preference to use another software able to open pdf's, but FF still wants to save the file. Finally, I do not have the option to open pdf's within FF, but if there was a way to do it, I'd take it.
I cannot reinstall FF as I use an older version (61.0.2; this is because I absolutely need the Properties/Descriptions of my bookmarks, which have disappeared in recent versions of FF).
I am attaching the pdf-related items from my about:config in case this would help spot the culprit.
Otherwise, I am desperate as sometimes I may have to read 10-20 pdf's a day, and I can't afford to save/delete those files every time. So, if you have any suggestions please do not hesitate to post them
Thank you!
PS: I don't know if this is relevant but after my friend's access to his webmail on my machine, my default printer was set to "Send To OneNote", which I of course changed back to my usual printer.

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[TrackerSupp-Daniel]

Hello Jmm,

Unfortunately Firefox has ended support for NPAPI plugins like ours and we can no longer display documents within the FF browser using our Editor, please follow the steps in this article to enable FF's built in preview function:
https://www.pdf-xchange.com/knowle ... or-instead

I hope this helps!

[jmm]

Thanks Daniel, I know FF stopped displaying pdfs inline. In fact, I liked better the option of opening XChange to view a pdf, which is what doesn't work anymore for me.
I guess this is a FF issue, so my post may not belong here (I posted elsewhere).
Regards

[TrackerSupp-Daniel]

Hello jmm,

No worries, In that case though I do still believe that article will help you, as follow it will take you to a location where you can specify to firefox to "open in..." after it saves the file.

Kind regards,

[jmm]

ok

[TrackerSupp-Daniel]

[jmm]

https://www.sevenforums.com/browsers-ma ... -them.html

[Will - Tracker Supp]

Thanks JMM