Revert "Use data URI on Safari."
Revert "Use data URI on Safari."

This reverts commit 54c50de0d617c48536fc82e0a7902027eeb53d20.

PeterDaveHello/cryptocat,DoNotUseThisCodeJUSTFORKS/cryptocat,arno01/cryptocat,Raynes/cryptocat,Cryptodog/cryptocat,DoNotUseThisCodeJUSTFORKS/cryptocat,PeterDaveHello/cryptocat,b4zz4/Barricada,b4zz4/Barricada,Raynes/cryptocat,Raynes/cryptocat,arno01/cryptocat,b4zz4/Barricada,wakermahmud/cryptocat,Cryptodog/cryptocat,DGO143/cryptocat,DoNotUseThisCodeJUSTFORKS/cryptocat,wakermahmud/cryptocat,DGO143/cryptocat,b4zz4/Barricada,DGO143/cryptocat