RPC config screens (about:requestpolicy) unusable with dark system colours

[kenyoni]

Browser

Name: Firefox
Version: 56.0.2
Build ID: 20171027085204
User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:56.0) Gecko/20100101 Firefox/56.0

Extensions

Name: RequestPolicy Continued Version: 1.0.beta13.2.1876.r489ddf49.pre Enabled: true
Name: Session Manager Version: 0.8.1.13 Enabled: true
Name: Tab Mix Plus Version: 0.5.0.4 Enabled: true
Name: Text Contrast for Dark Themes Version: 2.0.0 Enabled: true
Name: Tree Style Tab Version: 0.19.2017090601 Enabled: true
Name: uBlock Origin Version: 1.14.20 Enabled: true
Name: YouTube™ No Buffer (Stop Auto-playing) Version: 0.2.6 Enabled: true
Name: Firefox Lightbeam Version: 2.0.4 Enabled: false
Name: Ghostery Version: 8.0.0.34 Enabled: false
Name: Google Scholar Button Version: 2.0 Enabled: false
Name: HTTPS Everywhere Version: 2017.12.6 Enabled: false
Name: Modify Header Value (HTTP Headers) Version: 0.1.3 Enabled: false
Name: Open in VLC media player Version: 0.1.5 Enabled: false
Name: Rotate and Zoom Image Version: 1.4 Enabled: false
Name: Tab Session Manager Version: 1.7.1 Enabled: false
Name: User Agent Switcher Version: 1.1.2 Enabled: false
Name: YouTube™ auto Pause and Resume Version: 0.1.1 Enabled: false

Steps to reproduce:

Load a dark system theme (linux, maybe other OS's too) and go to about:requestpolicy

What happens?

White text on white background, dark text on dark background.

What should happen?

All text should be readable. For text boxes, assumptions about the default text and background colours should not be made. if one is set, then the other should be set also. The extension "Text Contrast for Dark Themes" deals with this for most web sites that don't follow the rules, but firefox does not allow the changing of fonts and colours for internal pages such as "about:" pages.

The colours can be made readable using the "Colours" setting in firefox, but this messes up colours on all pages.

[myrdd]

Hi @kenyoni, I'm not sure if it's really caused by the system setting. Maybe the "Text Contrast for Dark Themes" extension influences the colors on "about:requestpolicy" as well?

Could you please provide a screenshot?