@760ceb3b9c0ba4872cadf3ce35a7a4 I’d guess they were trying to differentiate in a safe way, after all the damage they did in the browser wars bringing in proprietary features (Legacy Update is based on one of them after all lol) and tons of bugs. they hit their peak with IE6 and then IE7 took another 5 years to happen, so web devs’ opinion of them got pretty negative while Firefox was killing it by just Following The Standards. with this, they could at least show they were doing something pretty straightforward and not proprietary (just a clever use of microformats), even if honestly nobody seemed to have really used this feature