Versions for Linux x86_64 and Mac OS X can be downloaded from http://sourceforge.net/project/showfiles.php?group_id=175748 An extension make firefox support Compiled HTML(.chm) file reading. After install, with "File | Open CHM File", you can open an CHM file in Firefox. With "View | Sidebar | CHM Reader" or press "Ctrl-E", the sidebar which contains topics and indexes listing of the CHM file will