How to Reset an advanced Firefox setting back to its default value.Only change settings and click on things if you know what you're doing. If you change things here incorrectly you can mess up Firefox. You can use the Search preference name box to find the setting you want to change, or alternatively you can click Show All to see a huge listing of all the options and then scroll through them to find the setting to change. To make it easy to find the ones that you are looking for, Firefox has a search feature at the top of the screen. You can now search for the advanced setting you want to changeįirefox has thousands of advanced options which can be changed on this screen.I recommend keeping this box ticked to remind you each time! This warning will appear each time you visit about:config unless you untick the ' Warn me when I attempt to access these preferences' checkbox.

Click the ' Accept the Risk and Continue' button. Accept the warning about changing advanced settingsīecause about:config will give you lots of advanced options which can potentially mess up Firefox, you will be warned about not changing anything you're not sure about.You do not need to put in or www or anything like that simply put about:config and press the Enter key on your keyboard. In the address bar, type in about:config and press enter. Start by clicking into the Address Bar at the top of your Firefox window. The more advanced settings for Firefox are only available by visiting a special url. WarningĬhanging settings with the Advanced Configuration Editor is a bit complicated, and you can 'break things' in Firefox if you aren't careful, so follow these steps closely. Updated at: It's easy to change the basic settings.įirefox makes it easy to change some of the more common settings you might want to customize - you simply open the Firefox menu and select 'Settings' and find the configuration option you want to modify.changing advanced settings takes a little more workīut some of the more advanced configuration options aren't available to change there - instead you need to open the special 'Advanced Configuration Editor' screen in Firefox and locate the setting you want to change. Change or reset an advanced setting in Firefox

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