Webkit and Chrome Canary Support

I use Webkit and Chrome Canary primarily as my main browsers, so I wanted to be able to use this script with those browsers as well.

Webkit is simply "Webkit" when configuring, but Chrome Canary is "chrome_canary" to keep the parsing that you have in the settings code.

Signed-off-by: Kennon Bickhart <kennon@kennonb.me>