this is the one with the TBrowser, works well on Desktop browser (no prompt), and also on mobile (with prompt):
http://mscportal.edm.ab.ec.gc.ca/MBhighwaysWxUpdate/dailywxupdate.html

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Steven/Phil/Nathan/Bruno @ Environment Canada wrote:

just to wrap this up.. what I finally did was use a TBrowser (as Matthew mentioned I might). That gives me a very elegant solution with Desktop browsers (the user is not prompted.. and the PDF is displayed in the 'frame'), This solution also works fine on a mobile (well, on mine anyway!), although the user does get prompted before it gets displayed, and it is displayed full-screen (not in the frame).

thanks all!