ChmFox bring the best CHM file reading experience to all platform.

You could open CHM file and reading it directly in Firefox after install this extension under Linux, Windows and Mac.

After CHM file opened, you could use Ctrl+M to show/hide the content and index sidebar for the current CHM file

You could also open CHM from command line

firefox local/path/to/chm/file.chm

or:

firefox chm:///local/path/to/chm/file.chm

ChmFox is derived from the great extension CHM Reader with the following improvements:
Support Firefox 4 and aboveSupport open CHM files directly using standard open file menuFix bug: Could not handle the relative url ../../some.css inside CHMSmart Sidebar: auto open/close ChmFox sidebar when needed. It also remember the sidebar status per file last timeChange hotkey for show/hide sidebar to Ctrl+MSupport open CHM files directly in the command line and associate CHM file type to firefoxL10N supportLots of bugs fixedPerformance improvement
It's now support following pl---------------------------------------------------------------------
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http://zhuoqiang.me/a/chmfox
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atforms
WindowsLinuxMac (x86 and x64)
For other platform, you have to compile it yourself:
http://bitbucket.org/zhuoqiang/chmfox