Chrome does not have this problem, but Firefox does on two different systems. I'd like to just adblock whatever code handles this stupid color background stuff, if that's possible -- the fact that FB Purity can do it suggests it is.
I tried unzipping FB Purity's Firefox extension (XPIs are just ZIPs) and looking at the code, but I couldn't figure it out.
I know m.facebook.com could let me skip it, but that's not a fun interface to stay within.
Any thoughts?