Revert "Don't block origin-less blob:-URLs in hosted viewer"
Revert "Don't block origin-less blob:-URLs in hosted viewer"

This reverts commit a6aca3cabe581319d93c862cb0b85f71580cacfd, since no version of Internet Explorer is supported any more.

mozilla/pdf.js,timvandermeij/pdf.js,macroplant/pdf.js,macroplant/pdf.js,nawawi/pdf.js,nawawi/pdf.js,Shoobx/pdf.js,mozilla/pdf.js,showpad/mozilla-pdf.js,mozilla/pdf.js,Snuffleupagus/pdf.js,Shoobx/pdf.js,showpad/mozilla-pdf.js,Snuffleupagus/pdf.js,macroplant/pdf.js,Snuffleupagus/pdf.js,timvandermeij/pdf.js,timvandermeij/pdf.js,showpad/mozilla-pdf.js,Shoobx/pdf.js,nawawi/pdf.js