The directory listing you posted is from an extracted tarball, NOT a "portable app" from that link in your original post. Which is it you're trying to use?
The "portable" version should work just like Firefox did. Download it, run it.
The version you posted the directory listing for needs to be compiled. The INSTALL document lists the steps you need to take. Provided you have all of the prerequisites, it's just three commands:
sudo make install
or you can skip the make install and just run it from the current directory
If you're missing a prerequisite, then it'll tell you.
Last edited by suicidaleggroll; 09-04-2014 at 02:26 PM.