--- a/browser/app/profile/firefox.js
+++ b/browser/app/profile/firefox.js
@@ -236,18 +236,16 @@ pref("extensions.dss.switchPending", fal
 
 pref("extensions.{972ce4c6-7e08-4474-a285-3208198ce6fd}.name", "chrome://browser/locale/browser.properties");
 pref("extensions.{972ce4c6-7e08-4474-a285-3208198ce6fd}.description", "chrome://browser/locale/browser.properties");
 
 pref("lightweightThemes.update.enabled", true);
 pref("lightweightThemes.getMoreURL", "https://addons.mozilla.org/%LOCALE%/firefox/themes");
 pref("lightweightThemes.recommendedThemes", "[{\"id\":\"recommended-1\",\"homepageURL\":\"https://addons.mozilla.org/firefox/addon/a-web-browser-renaissance/\",\"headerURL\":\"resource:///chrome/browser/content/browser/defaultthemes/1.header.jpg\",\"footerURL\":\"resource:///chrome/browser/content/browser/defaultthemes/1.footer.jpg\",\"textcolor\":\"#000000\",\"accentcolor\":\"#f2d9b1\",\"iconURL\":\"resource:///chrome/browser/content/browser/defaultthemes/1.icon.jpg\",\"previewURL\":\"resource:///chrome/browser/content/browser/defaultthemes/1.preview.jpg\",\"author\":\"Sean.Martell\",\"version\":\"0\"},{\"id\":\"recommended-2\",\"homepageURL\":\"https://addons.mozilla.org/firefox/addon/space-fantasy/\",\"headerURL\":\"resource:///chrome/browser/content/browser/defaultthemes/2.header.jpg\",\"footerURL\":\"resource:///chrome/browser/content/browser/defaultthemes/2.footer.jpg\",\"textcolor\":\"#ffffff\",\"accentcolor\":\"#d9d9d9\",\"iconURL\":\"resource:///chrome/browser/content/browser/defaultthemes/2.icon.jpg\",\"previewURL\":\"resource:///chrome/browser/content/browser/defaultthemes/2.preview.jpg\",\"author\":\"fx5800p\",\"version\":\"1.0\"},{\"id\":\"recommended-3\",\"homepageURL\":\"https://addons.mozilla.org/firefox/addon/linen-light/\",\"headerURL\":\"resource:///chrome/browser/content/browser/defaultthemes/3.header.png\",\"footerURL\":\"resource:///chrome/browser/content/browser/defaultthemes/3.footer.png\",\"textcolor\":\"#None\",\"accentcolor\":\"#ada8a8\",\"iconURL\":\"resource:///chrome/browser/content/browser/defaultthemes/3.icon.png\",\"previewURL\":\"resource:///chrome/browser/content/browser/defaultthemes/3.preview.png\",\"author\":\"DVemer\",\"version\":\"1.0\"},{\"id\":\"recommended-4\",\"homepageURL\":\"https://addons.mozilla.org/firefox/addon/pastel-gradient/\",\"headerURL\":\"resource:///chrome/browser/content/browser/defaultthemes/4.header.png\",\"footerURL\":\"resource:///chrome/browser/content/browser/defaultthemes/4.footer.png\",\"textcolor\":\"#000000\",\"accentcolor\":\"#000000\",\"iconURL\":\"resource:///chrome/browser/content/browser/defaultthemes/4.icon.png\",\"previewURL\":\"resource:///chrome/browser/content/browser/defaultthemes/4.preview.png\",\"author\":\"darrinhenein\",\"version\":\"1.0\"},{\"id\":\"recommended-5\",\"homepageURL\":\"https://addons.mozilla.org/firefox/addon/carbon-light/\",\"headerURL\":\"resource:///chrome/browser/content/browser/defaultthemes/5.header.png\",\"footerURL\":\"resource:///chrome/browser/content/browser/defaultthemes/5.footer.png\",\"textcolor\":\"#3b3b3b\",\"accentcolor\":\"#2e2e2e\",\"iconURL\":\"resource:///chrome/browser/content/browser/defaultthemes/5.icon.jpg\",\"previewURL\":\"resource:///chrome/browser/content/browser/defaultthemes/5.preview.jpg\",\"author\":\"Jaxivo\",\"version\":\"1.0\"}]");
 
-pref("browser.eme.ui.enabled", false);
-
 // UI tour experience.
 pref("browser.uitour.enabled", true);
 pref("browser.uitour.loglevel", "Error");
 pref("browser.uitour.requireSecure", true);
 pref("browser.uitour.themeOrigin", "https://addons.mozilla.org/%LOCALE%/firefox/themes/");
 pref("browser.uitour.url", "https://www.mozilla.org/%LOCALE%/firefox/%VERSION%/tour/");
 // This is used as a regexp match against the page's URL.
 pref("browser.uitour.readerViewTrigger", "^https:\/\/www\.mozilla\.org\/[^\/]+\/firefox\/reading\/start");
@@ -1810,24 +1808,32 @@ pref("identity.fxaccounts.migrateToDevEd
 #endif
 
 // On GTK, we now default to showing the menubar only when alt is pressed:
 #ifdef MOZ_WIDGET_GTK
 pref("ui.key.menuAccessKeyFocuses", true);
 #endif
 
 // Encrypted media extensions.
+pref("browser.eme.ui.enabled", false);
+
+#if !defined(MOZ_UPDATE_CHANNEL) || MOZ_UPDATE_CHANNEL != esr
 pref("media.eme.enabled", true);
 pref("media.eme.apiVisible", true);
 
 #ifdef XP_WIN
 pref("media.gmp-eme-adobe.enabled", true);
 pref("browser.eme.ui.enabled", true);
 #endif
 
+#else // MOZ_UPDATE_CHANNEL == esr
+pref("media.eme.enabled", false);
+pref("media.eme.apiVisible", false);
+#endif // MOZ_UPDATE_CHANNEL
+
 // Play with different values of the decay time and get telemetry,
 // 0 means to randomize (and persist) the experiment value in users' profiles,
 // -1 means no experiment is run and we use the preferred value for frecency (6h)
 pref("browser.cache.frecency_experiment", 0);
 
 pref("browser.translation.detectLanguage", false);
 pref("browser.translation.neverForLanguages", "");
 // Show the translation UI bits, like the info bar, notification icon and preferences.