If you’ve spent any time tweaking Firefox 3, you’ve probably seen the warning message telling you that you probably shouldn’t be changing any settings. Thankfully you can remove the checkbox and make the message go away… but what if you wanted it back?

如果您花了很多时间来调整Firefox 3，您可能已经看到警告消息，告诉您您可能不应该更改任何设置。 值得庆幸的是，您可以删除该复选框并使该消息消失……但是，如果您希望将其退回怎么办？

I know what you are thinking… why would you possibly want it back?

我知道您在想什么……您为什么可能要回去？

If you are customizing Firefox for somebody else and you turned the warning off… you might want to re-enable it after you are done to help prevent them from making changes.

如果您正在为其他用户自定义Firefox，并且关闭了警告，则可能需要在操作完成后重新启用它，以防止他人进行更改。

Re-Enable about:config Warning

重新启用about：config警告

Type in about:config into the address bar, and then filter by the following:

在地址栏中键入about：config ，然后按以下内容进行过滤：

general.warnOnAboutConfig

general.warnOnAboutConfig

Just double-click on the item to change the value back to true, and the warning message will show up again.

只需双击该项目以将值更改回true，警告消息将再次出现。

翻译自: https://www.howtogeek.com/howto/internet/firefox/how-to-re-enable-the-aboutconfig-warning-message-in-firefox-3/