content negotiation or by allowing the user directly to choose the file. Google announced on 31 August 2010 that it had started to index SVG content on the web, whether it is in standalone files or embedded in HTML, and that users would begin to see such content listed among their search results. It was announced on 8 December 2010 that Google Image Search would also begin indexing SVG files. The site announced an option to restrict image searches to SVG files on 11 February 2011. Native browser support Konqueror was the first browser to support SVG in release version 3.2 in February 2004. As of 2011, all major desktop browsers, and many minor ones, have some level of SVG support. Other browsers' implementations are not yet complete; see comparison of layout engines for further details. Some earlier versions of Firefox (e.g. versions between 1.5 and 3.6), as well as a smattering of other now-outdated web browsers capable of displaying SVG graphics, needed them embedded in <object> or <iframe> elements to display them integrated as parts of an HTML webpage instead of using the standard way of integrating images with <img>. However, SVG images may be included in XHTML pages using XML namespaces. Tim Berners-Lee, the inventor of the World Wide Web, was critical of early versions of Internet Explorer for its failure to support SVG. Opera (since 8.0) has support for the SVG 1.1 Tiny specification, while Opera 9 includes SVG 1.1 Basic support and some of SVG 1.1 Full. Opera 9.5 has partial SVG Tiny 1.2 support. It also supports SVGZ (compressed SVG). Browsers based on the Gecko layout engine (such as Firefox, Flock, Camino, and SeaMonkey) all have had incomplete support for the SVG 1.1 Full specification since 2005. The Mozilla site has an overview of the modules which are supported in Firefox and of the modules which are in development. Gecko 1.9, included in Firefox 3.0, adds support for more of the SVG specification (including filters). Pale Moon, which uses the Goanna layout engine (a fork of the Gecko engine), supports SVG. Browsers based on WebKit (such as Apple's Safari, Google Chrome, and The Omni Group's OmniWeb) have had incomplete support for the SVG 1.1 Full specification since 2006. Amaya has partial SVG support. Internet Explorer 8 and older versions do not support SVG. IE9 (released 14 March 2011) supports the basic SVG feature set. IE10