I did a fresh installation of WIndows 10 pro x64 and I use several browsers, i.e.->

  • Firefox portable ;

  • Google Chrome portable ;

  • Internet explorer (app and desktop) ;

  • Opera portable.

I've always been using several extensions for my browsers so far, and I got them after the new installation of Windows; in particular, I installed the following add-ons and plug-ins->

  • Adblock Plus (on Firefox and IE)
  • Adblock (on Chrome )
  • DownThem all! (on Firefox )
  • Ghostery (on Firefox and IE)
  • NoScript (on Firefox )
  • Scriptsafe (on Chrome)
  • pdfit (on Firefox )
  • SafePreview (on Firefox )
  • Unseen (on Firefox )
  • Wot (on IE )
  • Avg Web Tune Up (on IE )
  • Webutation (on Chrome)
  • Java Plug-in helper (in IE)
  • OpenH264 Video Codec provided by Cisco Systems, Inc. (on Firefox )
  • Primetime Content Decryption Module provided by Adobe Systems, Incorporated (on Firefox )
  • Widevine Content Decryption Module provided by Google Inc. (on Firefox )
  • Java Deployment Toolkit 8.0.1110.14 (on Firefox )
  • Java(TM) Platform SE 8 U111 (on Firefox )
  • WacomTabletPlugin (on Firefox )

Now I'm trying to download a file (see here ; you may also try by clicking on the article "Test sulle webcam (leggi l'articolo in pdf)" here ) , from a website from where I already downloaded such type of files in the past by using the same browsers on Windows 7 ultimate x64, and I never had any trouble before. I've been always using Foxit reader portable so far. On the contrary, what I get now is the following error on Firefox and Chrome ->


On IE I get a window asking me if I want to open or save a .json file (73 byte).

On Opera I get the following ->

enter image description here

but I cannot really choose the application I want to open the file with.

Why can't I open or save a pdf file, whichever browser I use for this purpose? For I getting several troubles since I upgraded to Windows 10, I wonder if the issue described above may depend on the operative system...

  • Those aren't PDF files. Those are .json files. I realize the links on the website say they are PDFs, but they're not. – n8te Nov 20 '16 at 11:09

I get the exact same error within Firefox when I follow your hyperlink, and the only add-on I am using is Adblock Plus. As a result, I am guessing that it is the source material rather than your web browsers.

Try downloading this one... it is a simple 4-page document comparing the features found in the various editions of Windows 10:

Windows 10 Editions Comparison

If you can download that PDF file, your original problem is definitely related to the source material at the distant end.

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