1 files changed, 138 insertions, 0 deletions
diff --git a/toolkit/mozapps/extensions/internal/AddonSettings.sys.mjs b/toolkit/mozapps/extensions/internal/AddonSettings.sys.mjs
new file mode 100644
index 0000000000..09bb0adc97
--- /dev/null
+++ b/toolkit/mozapps/extensions/internal/AddonSettings.sys.mjs
@@ -0,0 +1,138 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+import { XPCOMUtils } from "resource://gre/modules/XPCOMUtils.sys.mjs";
+import { AppConstants } from "resource://gre/modules/AppConstants.sys.mjs";
+
+import { AddonManager } from "resource://gre/modules/AddonManager.sys.mjs";
+
+const PREF_SIGNATURES_REQUIRED = "xpinstall.signatures.required";
+const PREF_LANGPACK_SIGNATURES = "extensions.langpacks.signatures.required";
+const PREF_ALLOW_EXPERIMENTS = "extensions.experiments.enabled";
+const PREF_EM_SIDELOAD_SCOPES = "extensions.sideloadScopes";
+const PREF_IS_EMBEDDED = "extensions.isembedded";
+const PREF_UPDATE_REQUIREBUILTINCERTS = "extensions.update.requireBuiltInCerts";
+const PREF_INSTALL_REQUIREBUILTINCERTS =
+  "extensions.install.requireBuiltInCerts";
+
+export var AddonSettings = {};
+
+// Make a non-changable property that can't be manipulated from other
+// code in the app.
+function makeConstant(name, value) {
+  Object.defineProperty(AddonSettings, name, {
+    configurable: false,
+    enumerable: false,
+    writable: false,
+    value,
+  });
+}
+
+if (AppConstants.MOZ_REQUIRE_SIGNING && !Cu.isInAutomation) {
+  makeConstant("REQUIRE_SIGNING", true);
+  makeConstant("LANGPACKS_REQUIRE_SIGNING", true);
+} else {
+  XPCOMUtils.defineLazyPreferenceGetter(
+    AddonSettings,
+    "REQUIRE_SIGNING",
+    PREF_SIGNATURES_REQUIRED,
+    false
+  );
+  XPCOMUtils.defineLazyPreferenceGetter(
+    AddonSettings,
+    "LANGPACKS_REQUIRE_SIGNING",
+    PREF_LANGPACK_SIGNATURES,
+    false
+  );
+}
+
+/**
+ * Require the use of certs shipped with Firefox for
+ * addon install and update, if the distribution does
+ * not require addon signing and is not ESR.
+ */
+XPCOMUtils.defineLazyPreferenceGetter(
+  AddonSettings,
+  "INSTALL_REQUIREBUILTINCERTS",
+  PREF_INSTALL_REQUIREBUILTINCERTS,
+  !AppConstants.MOZ_REQUIRE_SIGNING &&
+    !AppConstants.MOZ_APP_VERSION_DISPLAY.endsWith("esr")
+);
+
+XPCOMUtils.defineLazyPreferenceGetter(
+  AddonSettings,
+  "UPDATE_REQUIREBUILTINCERTS",
+  PREF_UPDATE_REQUIREBUILTINCERTS,
+  !AppConstants.MOZ_REQUIRE_SIGNING &&
+    !AppConstants.MOZ_APP_VERSION_DISPLAY.endsWith("esr")
+);
+
+// Whether or not we're running in GeckoView embedded in an Android app
+if (Cu.isInAutomation) {
+  XPCOMUtils.defineLazyPreferenceGetter(
+    AddonSettings,
+    "IS_EMBEDDED",
+    PREF_IS_EMBEDDED,
+    false
+  );
+} else {
+  makeConstant("IS_EMBEDDED", AppConstants.platform === "android");
+}
+
+/**
+ * AddonSettings.EXPERIMENTS_ENABLED
+ *
+ * Experimental APIs are always available to privileged signed addons.
+ * This constant makes an optional preference available to enable experimental
+ * APIs for developement purposes.
+ *
+ * Two features are toggled with this preference:
+ *
+ *   1. The ability to load an extension that contains an experimental
+ *      API but is not privileged.
+ *   2. The ability to load an unsigned extension that gains privilege
+ *      if it is temporarily loaded (e.g. via about:debugging).
+ *
+ * MOZ_REQUIRE_SIGNING is set to zero in unbranded builds, we also
+ * ensure nightly, dev-ed and our test infrastructure have access to
+ * the preference.
+ *
+ * Official releases ignore this preference.
+ */
+if (
+  !AppConstants.MOZ_REQUIRE_SIGNING ||
+  AppConstants.NIGHTLY_BUILD ||
+  AppConstants.MOZ_DEV_EDITION ||
+  Cu.isInAutomation
+) {
+  XPCOMUtils.defineLazyPreferenceGetter(
+    AddonSettings,
+    "EXPERIMENTS_ENABLED",
+    PREF_ALLOW_EXPERIMENTS,
+    true
+  );
+} else {
+  makeConstant("EXPERIMENTS_ENABLED", false);
+}
+
+if (AppConstants.MOZ_DEV_EDITION) {
+  makeConstant("DEFAULT_THEME_ID", "firefox-compact-dark@mozilla.org");
+} else {
+  makeConstant("DEFAULT_THEME_ID", "default-theme@mozilla.org");
+}
+
+// SCOPES_SIDELOAD is a bitflag for what scopes we will load new extensions from when we scan the directories.
+// If a build allows sideloading, or we're in automation, we'll also allow use of the preference.
+if (AppConstants.MOZ_ALLOW_ADDON_SIDELOAD || Cu.isInAutomation) {
+  XPCOMUtils.defineLazyPreferenceGetter(
+    AddonSettings,
+    "SCOPES_SIDELOAD",
+    PREF_EM_SIDELOAD_SCOPES,
+    AppConstants.MOZ_ALLOW_ADDON_SIDELOAD
+      ? AddonManager.SCOPE_ALL
+      : AddonManager.SCOPE_PROFILE
+  );
+} else {
+  makeConstant("SCOPES_SIDELOAD", AddonManager.SCOPE_PROFILE);
+}