The number of bits per pixel on a monochrome (greyscale) device. If the device isn't monochrome, the device's value is 0.
The number of bits per color component of the output device. If the device is not a color device, this value is zero.
the number of entries in the color look-up table for the output device.
Whether or not the output device is a grid device or a bitmap device. If the device is grid-based (such as a TTY terminal or a phone display with only one font), the value is true, otherwise it is false.
The name of the browser/environment.
The name of the browser's layout engine.
The name of the product hosting the browser.