我這裏下載的是火狐35.0.1
安裝之後，要設置不更新
設置之後看一下是否檢查更新，點擊工具欄上的幫助，關於Firefox，可以看到Firefox信息以及是否在更新。
需要修改配置文件channel-prefs,js...默認路徑是：C:\Program Files (x86)\Mozilla Firefox\defaults\pref
將release改爲defalut。會提示沒有權限修改，複製一份出來，修改後，粘貼進去，代替原有文件就好了。
/* 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/. */
pref("app.update.channel", "default");
* 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/. */
pref("app.update.channel", "default");