Hello.

When I open link on this url: http://backupbabiesphp-dev1.krk.u2i.com/test.html in my Firefox 3.0.16, the pdf file is opened with no problem. I am using Adobe Reader 8.0. If the Firebug also shows that the PDF file is loaded, then I suppose the problem can be in your pdf reader, or its integration with Firefox. Could you please try to use the latest version of pdf adobe acrobat reader and also the latest plug-in for FireFox? Thank you.

Best Regards,
Radek Macalik
Support Engineer

Hello! I'm experiencing this same issue (and have been) for quite a while now. If you try to open any of the PDF files listed on our site (say, at this link for instance http://www.eeye.com/Resources/Literature/Success-Stories.aspx ), a blank window appears when you use Firefox. Internet Explorer works fine.

I contacted Kentico support about this issue and they worked to find out what was happening, however they were unable to reproduce the problem on their end.

I learned that the issue lies in either the latest Firefox release (3.5.6+ I believe), the latest Adobe Acrobat PDF Reader Firefox plugin release (9.1.0.163+), or perhaps the combination of the two. This does not appear to be a Kentico issue.

You can actually see that the PDF was loaded by trying this little trick. When your popup window opens that is supposed to display the PDF file, try resizing your browser just a bit. Voila! Seems to work for me. I did some heavy research on this issue back when I was first noticing it but turned up very little. The upshot seems to be that the latest plugin that Adobe released isn't correctly redrawing the screen after the PDF file loaded within Chrome and Firefox. Resizing the browser window forces a redraw to happen, and thus, allows you to see the PDF.

Unfortunately, I haven't come up with a solution to fix this.

I hope that at least helps point you in the right direction. If you figure out a workaround, let us know!

Thanks,

Ryan

I definitely think that FireFox 3.5 + Acrobat Plugin 9.1 is causing the problem because I see the exact problem on machines with that set up and other machine works fine.

Here's a temporary fix:

Open up CMSPages/GetFile.aspx.cs and/or CMSPages/GetMediaFile.aspx.cs

Look for the following code

// Setup the mime type - Fix the special types
                string mimetype = file.MimeType;
                switch (file.Attachment.AttachmentExtension.ToLower())
                {
                    case ".flv":
                        mimetype = "video/x-flv";
                        break;
                }  

Modify it to

// Setup the mime type - Fix the special types
                string mimetype = file.MimeType;
                switch (file.Attachment.AttachmentExtension.ToLower())
                {
                    case ".flv":
                        mimetype = "video/x-flv";
                        break;
                    case ".pdf":
                        mimetype = "Application/X-unknown";
                        break;
                }  

What it does is that it checks to see if the file has the .pdf extension. If yes, force the server to return "Application/X-unknown" as the mimetype instead of the pdf mime type.

FireFox will react to this by asking if you want to save the file or open it with an application of your choice. In this case you can choose to open with Acrobat.