Oh I remember that - the times that Mozilla and Firefox spawned some interesting stuff. There was Sunbird - standalone XUL calendar app before it was reincorporated into Lightning and ended up as part of Thunderbird. Flock browser that embraced Web 2.0 and allowed to connect to various services. Mozilla Prism for web applications - kinda like Electron/CEF. Firefox OS (Boot2Gecko) for phones, tvs and tablets (I'm still using its ringtones on iPhone). Mozilla Persona - similar to OpenID but never got that much attention (my ISP even for a while tried to be an OpenID provider). Mozilla Raindrop that tried to accumulate various messaging services within the browser with CouchDB and own interface. And Instantbird - multi-network messenger that used XUL and libpurple. Joost - P2P internet tv application which was awfully sluggish, couldn't keep connections up to various "channels" but I enjoyed watching cartoons from 20s and 30s when these could load.

> There is no data, there is only XUL