As per the topic title, Internet Explorer 11 shows the PDF file name in tab that's showing PDFs opened from my HTML5 help. In Chrome and Firefox the tab shows the PDF doc title, which looks a lot neater and is more user friendly. E.g. IE11 will have 'user_guide.pdf' instead of 'User Guide v1.2' (or whatever) as the tab label.
It's the same if I open PDFs generated in Flare or Word, so I assume it's an IE problem.
I have made sure the properties of the PDF are set to Initial View > Show: Document Title for all PDFs.
Does anyone know how to force IE to show the PDF doc title rather than the file name?