It turns out, `WebKitWebProcess` was aborting (with no error message or
anything) because it couldn't find any fonts. I was only able to
determine this after attaching a remote debugger to it and getting a
backtrace. I had to wrap the `WebKitWebProcess` executable with a
script that launched it with `gdbserver`, and then connect to that
server from my development system.
These will be useful for inspecting with the graphical environment where
the kiosk browser is running, with the same privileges as the GUI
applications.
Dustin