There’s a new specification for filters that replaces the filters module in SVG 1.1. Firefox and Chrome are both implementing new features from this specification.
Firefox 30 was the first version to support feDropShadow As well as being simpler to write, feDropShadow will be faster than the equivalent individual filters as it skips some unnecessary colour conversions that we’d otherwise perform.
Firefox 35 has support for all CSS Filters so for simple cases you no longer need any SVG markup to create a filter. We’ve examples on MDN showing how to use CSS filters.
We’ve also implemented filter chaining, this is we support multiple filter either via URLs or CSS filters on a single element.
As with earlier versions of Firefox you can apply SVG and CSS filters to both SVG and HTML elements.
As part of the rewrite to support SVG filters we’ve improved their performance by using D2D on Windows to render them thus taking advantage of any hardware acceleration possibilities on that platform and on other platforms using SIMD and SSE2 to accelerate rendering so you can now use more filters without slowing your site down.