As for how to build: 1. Install Maemo SDK. (also apt-get install python2.5) 2. Follow these instructions: https://wiki.mozilla.org/Mobile/Build/Fennec 3. Use "ac_add_options --enable-application=mobile/xul" instead of "ac_add_options --enable-application=mobile" in your mozconfig. 4. After you run "make package", change directories to "objdir/mobile/xul/installer" and run "make deb".