I had a thought this morning. You could find out what the browser is by using ps
With the application not running, run ps -A and pipe the output to a file:
ps -A > somefile.txt
Then start the browser and do the same thing using a different file name.
Then you could compare the two files in a text editor or by using something like diff or meld. The name of the browser application should appear in the second file and not in the first.
diff somefile.txt someotherfile.txt