Modified by aerworker
Additional System Details
- User Agent: Opera/9.80 (Windows NT 6.1; WOW64; U; en) Presto/2.10.229 Version/11.62
A possibility might be to check the navigator.plugins array and search for the Adobe Reader plugin.
The PDF Viewer (pdfjs) doesn't seem to show there.
I've filed to determine difference by the window.navigator.plugins property too.
cor-el, the more your answers I found the more i'm confident you do not think about the problem described. It's sad, that mozila pay more attention on new mobile os, than on old user problems. Chrome will bite you for sure