diff --git a/.docker/firefox/neko.js b/.docker/firefox/neko.js
index 4a00ca31..2a1abb4b 100644
--- a/.docker/firefox/neko.js
+++ b/.docker/firefox/neko.js
@@ -26,3 +26,10 @@ lockPref("browser.helperApps.alwaysAsk.force",	false);
 lockPref("browser.helperApps.neverAsk.saveToDisk",	"application/zip,application/octet-stream,image/jpeg,application/vnd.ms-outlook,text/html,application/pdf");
 lockPref("browser.helperApps.neverAsk.openFile",	"application/zip,application/octet-stream,image/jpeg,application/vnd.ms-outlook,text/html,application/pdf");
 lockPref("browser.newtabpage.activity-stream.default.sites",	"https://www.youtube.com/,https://netflix.com,https://www.hulu.com/,https://9anime.to/,https://www.funimation.com/,https://www.disneyplus.com/,https://play.hbonow.com/,https://www.twitch.tv/");
+// dark mode
+lockPref("reader.color_scheme", "dark");
+lockPref("devtools.theme", "dark");
+lockPref("ui.systemUsesDarkTheme", 1);
+lockPref("lightweightThemes.usedThemes","[]");
+lockPref("lightweightThemes.selectedThemeID", "firefox-compact-dark@mozilla.org");
+lockPref("browser.in-content.dark-mode", true);