Have you ever added a custom about:config entry to your Firefox browser and then wished that you could remove it? Now you can with a simple reset tweak that focuses on singular entries.
您是否曾经在Firefox浏览器中添加过一个自定义about：config条目，然后希望将其删除？ 现在，您可以通过简单的重置调整来关注单个条目。
Note: It is highly recommended to keep a set of notes or listing of any modifications that you make to your about:config settings (default or custom entries). This is an extremely valuable asset if you need to undo changes at a later date.
注意：强烈建议保留一组注释或您对about：config设置所做的任何修改的列表(默认或自定义条目)。 如果您以后需要撤消更改，这是一项非常宝贵的资产。
The browser version used in our example is Firefox 3.5-beta99 and the custom added about:config entry is “nglayout.initialpaint.delay”.
在我们的示例中使用的浏览器版本是Firefox 3.5-beta99，关于about：config条目添加的自定义项是“ nglayout.initialpaint.delay”。
Digging into about:config
深入了解about：config
To get started, type “about:config” (without the quote marks) into the address bar and hit “Enter”. With the new beta version this is the message that you will see once you have hit “Enter” (unless you have previously deactivated this window by deselecting “Show this warning next time”). Click on “I’ll be careful, I promise!”.
首先，在地址栏中输入“ about：config”(不带引号)，然后按“ Enter”。 在新的Beta版本中，这是您在按“ Enter”键后将看到的消息(除非您之前已通过取消选择“下次显示此警告”来停用了此窗口)。 单击“我会小心，我保证！”。
Once you have clicked through, your browser window is going to look like this.
单击后，浏览器窗口将如下所示。
Since we know the exact custom about:config entry we are looking for, type or paste “nglayout.initialpaint.delay” (without the quote marks) into the “Filter” address bar (you do not need to hit “Enter” in order for the entry to display). And there is the entry we are looking for sorted out by itself.
由于我们知道我们要查找的关于：config条目的确切自定义，因此将“ nglayout.initialpaint.delay”(不带引号)键入或粘贴到“过滤器”地址栏中(您无需按“ Enter”键即可)显示的条目)。 我们正在寻找一个条目，它本身就是经过整理的。
Now we can make the tweak that we need to remove this custom entry from Firefox’s about:config entry set. Right click on the individual about:config entry line and select “Reset”.
现在，我们可以进行调整，以从Firefox的about：config条目集中删除此自定义条目。 右键单击有关about：config的单独输入行，然后选择“重置”。
Once you have clicked “Reset”, notice that the about:config entry is no longer in bold print, has been changed from a “user set integer” to a “default string”, and is now blank in the “Value” area.
单击“重置”后，请注意about：config条目不再以粗体显示，已从“用户设置整数”更改为“默认字符串”，并且现在在“值”区域中为空白。
At this point, you will need to restart your browser. Once you have restarted, it is time to verify that the custom about:config has been removed. Repeat the process of opening up the about:config window as listed as above and once again enter the name of the custom entry into the “Filter” address bar.
此时，您将需要重新启动浏览器。 重新启动后，就该确认自定义about：config已被删除。 重复上述打开about：config窗口的过程，然后在“过滤器”地址栏中再次输入自定义条目的名称。
As you can see, the entry no longer exists…you have effectively erased it from your browser!
如您所见，该条目不再存在……您已经从浏览器中有效删除了该条目！
Conclusion
结论
If you like experimenting with custom about:config entries in order to increase your browser’s performance, this tweak can be extremely useful to undo a change that may not be working very well for you. Have fun tweaking your browser!
如果您想尝试使用自定义about：config条目以提高浏览器的性能，则此调整对于撤消可能无法很好地进行的更改非常有用。 祝您浏览器调整愉快！
翻译自: https://www.howtogeek.com/howto/1698/remove-custom-aboutconfig-entries-the-easy-way/