1406592 - GitHub.com logo is almost invisible in black dev theme in Firefox 57+

Status: RESOLVED DUPLICATE of bug 1094357

(Firefox :: Theme, defect)

Description

[u580221]

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:58.0) Gecko/20100101 Firefox/58.0
Build ID: 20171005220204

Steps to reproduce:

1. Install Firefox 57+
2. Enable dark theme in right-click > Inspect > Settings icon (cogs) in top right of the inspect panel > Themes > [x] Dark
3. Visit github.com


Actual results:

Github's favicon on the tab is pretty much invisible. I can't recall this being a problem with Firefox <= 56, so this might be a regression with the new theme.


Expected results:

Firefox should probably detect logos below a certain darkness and surround them by a white box, since most favicons seem to be designed with a default bright theme in mind. Alternatively, just always put a white background behind logos in the dark theme (this is probably what Firefox <= 56 used to do? I forgot)