Disable color scheme to decrease FF boot time

The solarized-dark color scheme
(https://github.com/claytron/pentadactyl-solarized) was causing a very
long boot up/window open time for Firefox. I use my window manager's
tabs instead of Firefox's built in tabs. Because of this, the cost of a
slow startup time more than outweighs the benefit of having a nice color
scheme. So until I figure out if it is possible to reduce this startup
time, I'm opting to disable the color scheme.
Use my window manager's tabs not Firefox's tabs
Remove leading colons
Don't uppercase link hints