Hi, Has anyone considered a pure Javascript ZIM file reader and Wikipedia reader? I have made a small start, writing some hack code to open a ZIM file and it gets to the point of needing to uncompress a cluster. A start has been made on the needed XZ decompress code but it's not done yet. If practical then this could provide a portable offline reader that could suit any device with a modern web browser, and provide a reader for Android tablets, and Firefox OS, etc. Perhaps even node.js servers. If someone has already tried this and found the performance to be too poor then please let me know? Btw: has adding thumbnail image support to the ZIM file format been considered? This would be very handy for a ZIM file selector in a tablet or phone UI. Regards Douglas Crosher