Comment 51 for bug 1040313

Another comment from the dev team on one part of the unity extension (the ability to ask for the xid of a tab):
<lamalex> mterry, the xid patch has been approved by mozilla and is in firefox 17, our is just a backport for FF16 that preserves the current firefox 16 ABI so addons will continue to work
<lamalex> (and has been tested to ensure it does that)