diff --git a/src/common.js b/src/common.js
new file mode 100644
index 00000000..bf0ef35a
--- /dev/null
+++ b/src/common.js
@@ -0,0 +1,52 @@
+const fs = require('fs');
+const path = require('path');
+
+exports.fofo = {
+    pluginInfo: function () {
+        return JSON.parse(fs.readFileSync(path.join(__dirname, 'plugin.json')))
+    },
+    
+    isDev: function () {
+        return /[a-zA-Z0-9\-]+\.asar/.test(__dirname) ? false : true
+    },
+
+    pushData: function (databases, data) {
+        var db = utools.db.get(databases);
+        if (db) {
+            utools.db.put({ _id: databases, data: data, _rev: db._rev });
+        } else {
+            utools.db.put({ _id: databases, data: data });
+        }
+    },
+    
+    showChangeLog: function () {
+        this.pushData('plugin', { version: this.pluginInfo().version })
+        fs.readFile(path.join(__dirname, 'CHANGELOG.md'), { encoding: 'utf8' }, (err, data) => {
+            if (data) utools.ubrowser.goto(data, '更新日志').run({
+                width: 1080,
+                height: 860
+            })
+        })
+    },
+    
+    isRunningAtFirstTime: function () {
+        try {
+            var historyVersion = utools.db.get('plugin').data.version
+            if (historyVersion != this.pluginInfo().version) {
+                return true
+            } else {
+                return false
+            }
+        } catch (error) {
+            return true
+        }
+    },
+    
+    GetFilePath: function (Path, File) {
+        if (isDev) {
+            return path.join(__dirname, Path, File)
+        } else {
+            return path.join(__dirname.replace(/([a-zA-Z0-9\-]+\.asar)/,'$1.unpacked'), Path, File)  
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/preload.js b/src/preload.js
index 5d2c888b..4d21cba8 100644
--- a/src/preload.js
+++ b/src/preload.js
@@ -1,17 +1,13 @@
 const { clipboard } = require('electron');
 const { exec } = require('child_process');
 const crypto = require('crypto')
-
-//-------checkUpdate------
 const fs = require('fs');
-const path = require("path")
 
-pluginInfo = JSON.parse(fs.readFileSync(path.join(__dirname, 'plugin.json')));
+fofoCommon = require('./common').fofo
 
 open = url => {
     utools.shellOpenExternal(url);
 }
-// ------------------------
 
 dirname = __dirname;