This Bugzilla instance is a read-only archive of historic NetBeans bug reports. To report a bug in NetBeans please follow the project's instructions for reporting issues.
It could be worth to try to support zipped tar archives as well.
I don't think this makes sense - there is no random access for compressed TAR archives. You would have to hold the whole thing in memory. It would be really slow, users would be better off unpacking the archive IMHO.
Anyway somebody can develop a module to cover it, its not openide's responsibility.
Agreed - verifying.