[Bug-gnuzilla] Javascript error in icecat, works fine with firefox: TypeError: xxx is not a function

[Robert Bieber]

When trying to log into the administrative website of my synology NAS, I 
get this error:

TypeError: SYNO.Encryption.EncryptParam is not a function


The javascript code responsible for causing it looks like this:

e = SYNO.Encryption.EncryptParam(e);

Logging in with firefox gives me no such issues and the error does not 
occur. Would be great to get some input on this.