I prefer viewerjs.org - I don't believe it if people that say that every modern platform has a PDF viewer.
Having a document hosted on your own website together with a javascript viewer reduces the risk for users both in terms of privacy and security, as Acrobat Reader is a seriously problematic piece of code and all the remote code is a serious violation of trust between the user and the owner of the site.
Having a document hosted on your own website together with a javascript viewer reduces the risk for users both in terms of privacy and security, as Acrobat Reader is a seriously problematic piece of code and all the remote code is a serious violation of trust between the user and the owner of the site.