I absolutely HATE the fact the URL changes to some non-public internal URL that I can't easily copy and paste to share. When I click on a URL link on a website to open a PDF, I fully expect the URL to remain the public URL so I can copy the address bar to enter the location in an email or chat etc. Instead, the in-browser PDF viewer changes the URL to a internal chrome-extension URL which obviously cannot be shared with others. Come on developers... this is obvious stuff and a horrible user experience.