Some text colors are rendered incorrectly

[cinerea0]

Describe the bug:
Some text colors are too low-contrast to be visible, and some sections of pages do not have the correct background color.

Expected behavior:
The style should make GitHub look as advertised in the README.

Where did this happen:
This occurs on all GitHub pages.

Steps to reproduce:
Unknown, it just kind of started happening.

Screenshots:

Desktop (please complete the following information):

• OS: Void Linux (kernel version 5.10.20)
• Browser: Firefox
• Version: 86.0

Additional add-ons installed:

• Archive Page
• Auto Tab Discard
• Bypass Paywalls
• Canvas Blocker
• Chameleon
• ClearURLs
• Decentraleyes
• Disable WebRTC
• enhanced-h264ify
• Firefox Color
• Gitako
• github-vscode-icons
• Hide Files on GitHub
• Image Search Options
• Lovely forks
• Reddit Enhancement Suite
• Refined GitHub
• SponsorBlock
• startpage
• Tampermonkey
• Tree Style Tab
• True Sight
• uBlock Origin
• uMatrix

I think it's worth noting that I'm using arkenfox user.js. Also, none of the available theme settings make things look right:

[Amar1729]

I'm getting the same issue. Feels like github must have changed their site code, breaking this style.

Desktop: MacOS Catalina 10.15.7
Browser: Firefox 85.0.2 / 86.0

Similar problem in the Issues/Pull Requests tabs.

[Ultra-Hax]

Any fix?