Same for me, but I do have my screen's brightness turned down so that white backgrounds don't glare. FWIW, I discovered the Firefox plug-in Tranquility recentl

Same for me, but I do have my screen's brightness turned down so that white backgrounds don't glare. FWIW, I discovered the Firefox plug-in Tranquility recently. It is sort of a light-weight Readability. Although it has far fewer tweaks available, it compensates by using much less resources. Readability was pretty much unusable on my low-spec laptop.