It works fine for me (I always use firefox for it -- no IETab even), including right-click context menu (having email options menu rather than normal right-click menu). I've not used it much in IE for quite a long time so it's possible there are features there that Firefox users don't get that I've not noticed, but I think it's vastly improved on how it used to be for other browsers than IE, and it's quite likely all the features are there.
Cheers,
Jonathan