Not working for certain sites

[spoorun]

Some sites are not currently working:
youtube.com, reddit.com, raindrop.io, instagram.com, messenger.com, linkedin.com

Even when de-selecting 'use colors provided by the webpage' and instances of 'apply page colours' the colour change appears to have no impact.

Using: VIvaldiFox v3.6 via Firefox 118.0.1 running on Manjaro KDE with Wayland, and firefoxpwa