added hybrid sdk and bootstrapped add-ons transitioning to webextensions.

embedded-webextension-bootstrapped/step1-hybrid-addon/chrome/AddonPrefs.jsm

@@ -0,0 +1,41 @@
+"use strict";
+
+var EXPORTED_SYMBOLS = ["AddonPrefs"];
+
+Components.utils.import("resource://gre/modules/Services.jsm");
+
+const BASE_PREF = "extensions.original-bootstrap-addon-id.";
+
+function get(key, type = "char") {
+  key = BASE_PREF + key;
+
+  switch(type) {
+  case "char":
+    return Services.prefs.getCharPref(key);
+  case "bool":
+    return Services.prefs.getBoolPref(key);
+  case "int":
+    return Services.prefs.getIntPref(key);
+  }
+
+  throw new Error(`Unknown type: ${type}`);
+}
+
+function set(key, type, value) {
+  key = BASE_PREF + key;
+
+  switch(type) {
+  case "char":
+    return Services.prefs.setCharPref(key, value);
+  case "bool":
+    return Services.prefs.setBoolPref(key, value);
+  case "int":
+    return Services.prefs.setIntPref(key, value);
+  }
+
+  throw new Error(`Unknown type: ${type}`);
+}
+
+var AddonPrefs = {
+  get, set,
+};