This is becoming far too common. It seems like every good long read I see these days is on a site affected by this problem. Even the tiniest scroll jump causes

This is becoming far too common. It seems like every good long read I see these days is on a site affected by this problem. Even the tiniest scroll jump causes these things to appear and disappear, moving or obscuring the relevant content underneath. I've been thinking of making a Firefox extension that allows you to whitelist "position: fixed" on a per-site basis, but that won't help much on Mobile Safari!