We build Firefox from the official Mozila source code, we use a .mozconfig file to set all configure options. SliTaz firefox.mozconfig is copied in the mozilla source code with the command 'tazwok cook'. So if you want to make some changes, edit firefox.mozconfig. On SliTaz the Mozilla default icons are removed (65 Ko) and a resized (48x48) mozicon is put in /usr/share/pixmaps. browserconfig.properties is used to set www.slitaz.org for the default home page, this file goes in /usr/lib/firefox-$VERSION with the bookmarks file. We dont use --enable-official-branding since we dont have any authorization to use trademarks per http://www.mozilla.org/foundation/trademarks/ - Pankso