Update Firefox extension metadata
Update Firefox extension metadata

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