[OriginalSyn]

That chart is misleading. V8 supports (and has supported it for a long time) the vast majority of ES5. Since version 13 it's supported every ES5 features with the exception of Zero-width chars in identifiers, and I don't know when, but it was implemented somewhere between 16 and 23.

http://kangax.github.com/es5-compat-table/

[timvandevelde]

Webkit does support SVG filters but there is a bug which prevents displaying the filters when embedded in HTML.