diff --git a/config.js b/config.js
index 88304e2..0079fe9 100644
--- a/config.js
+++ b/config.js
@@ -1,8 +1,8 @@
 class ConfigClass {
     constructor() {
         this.onStorageChange = this.onStorageChange.bind(this);
-        this.set("version", browser.runtime.getManifest().version);
-        this.set("addon", "Glitter Drag");
+        this["version"] = browser.runtime.getManifest().version;
+        this["addon"] = "Glitter Drag";
         browser.storage.onChanged.addListener(this.onStorageChange);
     }
 
diff --git a/content_scripts/content_script.js b/content_scripts/content_script.js
index 9909ab0..c8892a2 100644
--- a/content_scripts/content_script.js
+++ b/content_scripts/content_script.js
@@ -191,7 +191,6 @@ class DragClass {
         }
     }
     dragstart(evt) {
-        this.DATATRANSFER = evt.dataTransfer;
         if (bgConfig.enableIndicator) {
             if (this.indicatorBox === null) this.indicatorBox = new Indicator();
             this.indicatorBox.place(evt.pageX, evt.pageY, bgConfig.triggeredDistance);
@@ -272,6 +271,7 @@ class DragClass {
                     actions = bgConfig.Actions;
                 }
                 let message = ""
+                // TODO: buffer i18n message to run faster
                 message = getI18nMessage(actions[this.actionType][this.direction]["act_name"]);
                 // }
                 this.promptBox.render(this.direction, message);
@@ -674,23 +674,19 @@ let bgPort = browser.runtime.connect({
 let bgConfig = null;
 let mydrag = null;
 
-function main() {
-    bgPort.onMessage.addListener((c) => {
-        bgConfig = JSON.parse(c);
-        // console.log(bgConfig);
-        if (mydrag === null) {
-            if (["loading", "interactive"].includes(document.readyState)) {
-                document.addEventListener("DOMContentLoaded", () => {
-                    mydrag = new DragClass(document);
-                }, {
-                    once: true
-                });
-            }
-            else {
+bgPort.onMessage.addListener((c) => {
+    bgConfig = JSON.parse(c);
+    // console.log(bgConfig);
+    if (mydrag === null) {
+        if (["loading", "interactive"].includes(document.readyState)) {
+            document.addEventListener("DOMContentLoaded", () => {
                 mydrag = new DragClass(document);
-            }
+            }, {
+                once: true
+            });
         }
-    })
-}
-main();
-setTimeout(main, 2000);
\ No newline at end of file
+        else {
+            mydrag = new DragClass(document);
+        }
+    }
+})
\ No newline at end of file
diff --git a/manifest.json b/manifest.json
index 1e49029..0f2f66b 100644
--- a/manifest.json
+++ b/manifest.json
@@ -2,7 +2,7 @@
     "description": "__MSG_extensionDescription__",
     "manifest_version": 2,
     "name": "__MSG_extensionName__",
-    "version": "1.50.0b10",
+    "version": "1.50.0",
     "homepage_url": "https://github.com/harytfw/GlitterDrag",
     "icons": {
         "48": "Drag.png",
diff --git a/options/options.html b/options/options.html
index 8257f8f..d6955fe 100644
--- a/options/options.html
+++ b/options/options.html
@@ -150,8 +150,8 @@
                     <label for="timeoutCancel" data-i18n="TimeoutCancel">超时取消时间（ms）</label>
                     <input type="number" id="timeoutCancel">
                     <br>
-                    <input disabled type="checkbox" id="enableSync">
-                    <label for="enableSync" data-i18n="EnableSync">同步到Firefox账户(v53+)</label>
+                    <!-- <input disabled type="checkbox" id="enableSync"> -->
+                    <!-- <label for="enableSync" data-i18n="EnableSync">同步到Firefox账户(v53+)</label> -->
                 </li>
                 <li class="tab-content" id="tab-download">
                     <button data-i18n="ShowDefaultDownloadDirectory" id="showDefaultDownloadDirectory">打开浏览器的默认下载目录</button>