1535860 - enhancement: provide "about:color" or "about:graphics"

Status: UNCONFIRMED

(Toolkit :: General, enhancement, P5)

Description

[Ulrich Windl]

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Firefox/60.0

Steps to reproduce:

While finding the cause of some odd wrong color displaying in Firefox, I noticed that I cannot get information about the graphics device (like number of colors, colorimetric properties, acceleration capabilities, connected screen, etc)

Actual results:

I could not find information how Firefox sees my display.
In contrast xdpyinfo would display thing like (omitted features that won't be used anyway):
...
depth 8, bits_per_pixel 8, scanline_pad 32
depth 15, bits_per_pixel 16, scanline_pad 32
depth 16, bits_per_pixel 16, scanline_pad 32
depth 24, bits_per_pixel 32, scanline_pad 32
depth 32, bits_per_pixel 32, scanline_pad 32
...
number of extensions: 28
...
DRI2
DRI3
GLX
...
XFree86-VidModeExtension
XINERAMA
...

Expected results:

It should be possible to query some display and color management properties (as Firefox sees them)