I know there is a plugin that allows glsl shaders as plasma live wallpapers and I bet you could make some sort of shader that just changes hue of the texture over time if one doesn’t already exsist.

I at least switched to Floorp for more customization options and funny name, but back then Floorp also had vertical tabs and side-dock before any other Firefox fork (afaik).

If saving node states is what you want there is a page for that in docs.