Opening CHM Files From Nautilus Rated 4 out of 5 stars
Pretty good plugin so far. If you would like to open the CHM files from Nautilus (the windows manager for Gnome), then right click on the CHM file and select "Open with other Application..." from the context menu.
The "Open with" dialog should now be visible. Select "Firefox" and expand the "Use custom command" option. Replace "firefox" with "firefox chm:%U" and apply the command by clicking the "Open" button.
The CHM file will now open in Firefox and any time afterwards when a CHM file is double clicked.