If you downloaded Comixer 0.5 to install it on a Debian-based Linux system OTHER than Ubuntu, you may have encountered a problem getting the User Manual to open.

The reason is that on non-Ubuntu Debian derivatives you may not be able to open the Firefox browser by simply typing “firefox” in a terminal, as there isn't a binary file for it in the expected locations (in other words, not in the same locations Ubuntu puts them).

To Fix It:

In a text editor open the file at

~/.gnome2/nautilus-scripts/Comixer/user manual

(note: If yo open it from the CLI you'll need to put it in quotes due to the space in the file name.  If you navigate to it with the file browser you'll need to go under “View” and select to “Show Hidden Files” or you won't be able to see the “.gnome2″ folder)

It only has one command line in it:

firefox $HOME/.comixer/manual.html

change it to:

/usr/lib/firefox/firefox $HOME/.comixer/manual.html

(there is a space between “firefox” and “$HOME”)

It doesn't fix this particular issue, but if your Linux distribution doesn't launch Firefox when you enter “firefox” at the command line and you would like it to do so, and if you have root priveleges you can create a script in /usr/bin that will.  All it needs is the /usr/lib/firefox/firefox in it and to be made executable.