fwiw, the firefox extension "stylish" allows per-site css overrides in the same way, although without the fancy inspector. https://addons.mozilla.org/en-US/fir

fwiw, the firefox extension "stylish" allows per-site css overrides in the same way, although without the fancy inspector. https://addons.mozilla.org/en-US/firefox/addon/2108/ https://addons.mozilla.org/en-US/firefox/addon/2108/ i've been using this to get rid of the gray on HN for a long time (http://i.imgur.com/uVNzT.png http://i.imgur.com/uVNzT.png) and also to do some custom ad blocking/content shifting on other sites.