I suppose that's convenient, although I personally find it bothersome how open source so closely copies everything they can.
Opera isn't OSS. In the modern world, Opera and Mozilla have been in a neck-and-neck feature race for years while IE has stagnated. But I hear that IE may get popup blocking and tabbing with XP SP2 (leaving W2K IE users with no MS browser upgrade). Who's copying?
And one thing that will fry the minds of Microserfs everywhere: The latest Mozilla/Firefox is actually smaller and faster than its predecessor even with the new features.
Bwhahahaha MS has built themselves taking technology form other people (Hell they did not even develop DOS, as copied numberous Ideas from APPLE)..
So GE makes a claim the IE does something nobody else does, Its pointed out *everybody else does that* and instead of admitting he was wrong he changes the subject... Good show man..
MSIE is ubiquitous enough to create de-facto standards. Why should you be surprised if competitors use those de-facto standards rather than require users to re-learn everything? The latter approach actually hurt Microsoft once upon a time converting people from WordPerfect to MS Word (back in the Word 2.0 days).
And, as has already been pointed out, Opera is not open source, but a proprietary commercial product.