使用Firefox Mobile for Android。我想默认锁定桌面模式的选项。菜单选项仅适用于每个选项卡，如果我打开新选项卡，则忘记。
Using Firefox Mobile for Android. I want to lock the option for Desktop mode on by default. The menu option only applies per-tab and is forgotten if I open a new tab.
I have looked around at extensions and in about:config without finding anything.
Can anyone help?
Have you looked at this extension?
About this Add-on
This add-on enables desktop mode by default; that is, "Request Desktop Site" is always checked whenever opening a new tab. This is designed for users with larger screens (primarily tablet users).
NOTE: Make sure "Request Desktop Site" and/or Phony are disabled when viewing this page; otherwise, you may not be able to see the install button.
EDIT: Take this tutorial you can:
For value, enter the browser user agent string you want to use. You can do a Google search for the user agent strings of your preferred browser and OS. In this example, we're using the user agent string for the desktop version of Firefox 17 on Windows 7.
Mozilla/5.0 (Windows NT 6.1; WOW64; rv:17.0) Gecko/20100101 Firefox/17.0
Restart Firefox and confirm that Web sites are loading the desktop versions. That's it. If you want to change the user agent later, go back to about:config and search for "general.useragent.override." Hit the Modify button to change the user agent or the Reset button to remove it.