-diff -ur mozilla.orig/browser/app/profile/firefox.js mozilla/browser/app/profile/firefox.js
---- mozilla.orig/browser/app/profile/firefox.js 2008-06-21 12:55:30.000000000 +0200
-+++ mozilla/browser/app/profile/firefox.js 2008-06-21 15:25:48.000000000 +0200
-@@ -65,7 +65,7 @@ pref("extensions.hotfix.certs.1.sha1Fingerprint", "F1:DB:F9:6A:7B:B8:04:FA:48:3C
+--- firefox-66.0.3/browser/app/profile/firefox.js.orig 2019-04-09 21:59:43.000000000 +0200
++++ firefox-66.0.3/browser/app/profile/firefox.js 2019-04-22 16:01:43.348625457 +0200
+@@ -53,7 +53,7 @@
// Disable add-ons that are not installed by the user in all scopes by default.
// See the SCOPE constants in AddonManager.jsm for values to use here.
// Scopes to scan for changes at startup.
pref("extensions.startupScanScopes", 0);
-@@ -130,7 +130,7 @@
- pref("app.update.backgroundMaxErrors", 10);
-
- // Whether or not app updates are enabled
--pref("app.update.enabled", true);
-+pref("app.update.enabled", false);
-
- // Whether or not to use the doorhanger application update UI.
- pref("app.update.doorhanger", true);
-@@ -150,7 +150,7 @@
- // If set to true, the Update Service will automatically download updates when
- // app updates are enabled per the app.update.enabled preference and if the user
- // can apply updates.
--pref("app.update.auto", true);
-+pref("app.update.auto", false);
+@@ -140,7 +140,7 @@
+ // should no longer be used directly. Instead, getAppUpdateAutoEnabled and
+ // getAppUpdateAutoEnabled from UpdateUtils.jsm should be used.
+ #ifndef XP_WIN
+- pref("app.update.auto", true);
++ pref("app.update.auto", false);
+ #endif
// If set to true, the Update Service will present no UI for any event.
- pref("app.update.silent", false);
-@@ -242,7 +242,7 @@
- pref("browser.uidensity", 0);
+@@ -227,7 +227,7 @@
+ pref("browser.touchmode.auto", true);
// At startup, check if we're the default browser and prompt user if not.
-pref("browser.shell.checkDefaultBrowser", true);
pref("browser.shell.shortcutFavicons",true);
pref("browser.shell.mostRecentDateSetAsDefault", "");
pref("browser.shell.skipDefaultBrowserCheckOnFirstRun", true);
-@@ -494,6 +494,8 @@
-
- pref("browser.bookmarks.showRecentlyBookmarked", true);
+@@ -501,6 +501,8 @@
+ // Whether menu should close after Ctrl-click, middle-click, etc.
+ pref("browser.bookmarks.openInTabClosesMenu", true);
+pref("intl.locale.matchOS", true);
+
// Scripts & Windows prefs
pref("dom.disable_open_during_load", true);
pref("javascript.options.showInConsole", true);
-@@ -629,7 +629,7 @@
+@@ -646,7 +648,7 @@
+ pref("mousewheel.with_control.action",3);
pref("mousewheel.with_win.action", 1);
- pref("browser.xul.error_pages.enabled", true);
-pref("browser.xul.error_pages.expert_bad_cert", false);
+pref("browser.xul.error_pages.expert_bad_cert", true);
+ pref("browser.xul.error_pages.show_safe_browsing_details_on_load", false);
// Enable captive portal detection.
- pref("network.captive-portal-service.enabled", true);
--- a/modules/libpref/init/all.js
+++ b/modules/libpref/init/all.js
@@ -1510,7 +1510,7 @@ pref("layout.css.visited_links_enabled", true);