An offline dictionary based on Wiktionary.
Offline Wiktionary for Chrome 9 and above.
Uses HTML5 <progress> element, includes JS implementation of LZMA compression engine, WIkiText parser, Files, FileReader, Blobs, FileWriter, WebWorkers, Typed Arrays, header/footer html tags, uses HTML5 FileSystem API, xkcd comic #214, levenschtein difference, a search engine that incorporates over 4 consumer signals, binary XHR, and lots of cool stuff. Definitions and suggestions appear instantly as you're typing. And please give me a Cr48.
I'm also aware that I probably broke the no-perspectives rule on the icon, but the web store icon also has a perspective, so I doubt it's a huge issue. And whatever you do, do not open the web inspector, because it has memory leaks with successive file reads that happens a lot with its binary search algorithm. Not opening web inspector is fine.
This is basically a pre-release of js-wikireader which is pretty much the same thing except that js-wikireader handles multiple several-gigabyte wikipedia dumps. I'm pretty certain it works pretty well already, but I haven't figured out how to get hosting and downloading (probably payment too) to work for those dumps. But anyway, the code for that (and most of this) can be found at https://github.com/antimatter15/js-wikireader