Changes

| valign="top" |Support for loading and saving of .mht files(can see [http://maf.mozdev.org/ maf] as well as its XPCOM JS components [http://www.mozdev.org/source/browse/maf/src/components/nsMafMhtHandler.js?rev=1.21&content-type=text/x-cvsweb-markup handler], [http://www.mozdev.org/source/browse/maf/src/components/nsMafMhtEncoder.js?rev=1.16&content-type=text/x-cvsweb-markup encoder] and [http://www.mozdev.org/source/browse/maf/src/components/nsMafMhtDecoder.js?rev=1.16&content-type=text/x-cvsweb-markup decoder])