# HG changeset patch # User Steve Losh # Date 1562688411 14400 # Node ID 65ae96549ad8f6f897cb386c222b83a2afde5d4e # Parent 6fd5341d9cd8a737e47e31403d1ba4e7eb33a4fc Update diff -r 6fd5341d9cd8 -r 65ae96549ad8 README.markdown --- a/README.markdown Tue Jul 09 11:58:58 2019 -0400 +++ b/README.markdown Tue Jul 09 12:06:51 2019 -0400 @@ -673,3 +673,5 @@ `~/.mozilla/firefox/*/chrome/userChrome.css`: .browserContainer { background-color: #000000 !important; } + +And in `about:config` set `browser.display.background_color` to black.