diff --git a/linux/build/preferences/syspref.js b/linux/build/preferences/syspref.js
index 42d4219..ba88ab8 100644
--- a/linux/build/preferences/syspref.js
+++ b/linux/build/preferences/syspref.js
@@ -258,7 +258,8 @@ pref("plugin.state.java", 0);
 pref("plugin.state.libgnome-shell-browser-plugin", 0);
 pref("plugins.click_to_play", true);
 pref("plugins.load_appdir_plugins", false);
-pref("plugins.update.notifyUser", true);
+pref("plugins.update.notifyUser", false);
+pref("plugins.update.url", "");
 // PREF: Clear history when Firefox closes
 // pref("privacy.sanitize.sanitizeOnShutdown", true);
 // pref("privacy.clearOnShutdown.cache", true);
@@ -319,4 +320,4 @@ pref("webgl.disabled", true);
 pref("webgl.disable-extensions", true);
 pref("webgl.disable-fail-if-major-performance-caveat", true);
 pref("webgl.enable-debug-renderer-info", false);
-pref("webgl.min_capability_mode", true);
\ No newline at end of file
+pref("webgl.min_capability_mode", true);
diff --git a/windows/build/preferences/syspref.js b/windows/build/preferences/syspref.js
index 42d4219..ba88ab8 100644
--- a/windows/build/preferences/syspref.js
+++ b/windows/build/preferences/syspref.js
@@ -258,7 +258,8 @@ pref("plugin.state.java", 0);
 pref("plugin.state.libgnome-shell-browser-plugin", 0);
 pref("plugins.click_to_play", true);
 pref("plugins.load_appdir_plugins", false);
-pref("plugins.update.notifyUser", true);
+pref("plugins.update.notifyUser", false);
+pref("plugins.update.url", "");
 // PREF: Clear history when Firefox closes
 // pref("privacy.sanitize.sanitizeOnShutdown", true);
 // pref("privacy.clearOnShutdown.cache", true);
@@ -319,4 +320,4 @@ pref("webgl.disabled", true);
 pref("webgl.disable-extensions", true);
 pref("webgl.disable-fail-if-major-performance-caveat", true);
 pref("webgl.enable-debug-renderer-info", false);
-pref("webgl.min_capability_mode", true);
\ No newline at end of file
+pref("webgl.min_capability_mode", true);