Re:Opera confirms support for WebKit vendor prefixes
by alexchamberlain on Wednesday April 25, 2012 @03:40PM
(#3890656)
The first 2 are simply version issues, whilst the 3rd is nothing to do with the rendering engine. Chrome uses V8, Safari does not.
IndexedDB - Chrome Mobile has it (outdated version), Android and iPhone do not.
Chrome will have Dart support at a later date, no other WebKit vendor is going to implement it.
There are literally dozens, just go to caniuse.com and play around for a bit.