Today I realized that my lumia 950 is unable to open pdf files. It used to work properly. Anybody knows the reason??
They know they broke it, say they will fix it.
FWIW, I have been using the free Adobe PDF reader; it has a few features not present in the browser - you can search for text - but you have to download the file first, which doesn't always work, depending on how a site offers a PDF.