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About:Config Not Working? 3 Different Ways to Fix it

Users yet to update Firefox are likely to encounter this issue

4 min. read

Updated onOctober 4, 2023

updated onOctober 4, 2023

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Key notes

Firefox is one of the best browsers for the Windows platform, but it seems some users are having certain issues with it. One of the issues that seem to affect many Firefox users is about config not working on Firefox.

Meanwhile, the Configuration Editor, about:config page is an internal address that lets you view, change, or reset advanced preference settings in Firefox.

An alternative to its use is available in the Beta and Nightly versions of Firefox for Android. Popular add-ons are also available to help ease the configuration and adjustments.

In this article, we’ll show you how to fix the about:config not working on Firefox issue.

Why is about:config not working in Firefox?

Daylight build of Firefox disabled

The common problem that Firefox users have reported when it comes to usingabout:configis that the Firefox Daylight (Fenix) for Android which has been in use all along now blocks about:config.

Using an outdated version of Firefox

Users yet to update Firefox to the latest version are likely to keep facing this issue. To learn more,check our Firefox issues articlefor additional information.

How do I change settings in Firefox?

Many of the preferences are advanced settings that are not present in the Settings panel. Below are descriptions of how to change or reset Firefox preference settings, if you need to do so.

– Modify Preferences

You can double-click on a preference to change its value or you can choose to do any of the following:

– Reset or delete preferences

To reset a preference to its default value, click theResetbutton. To remove an added preference, click the Delete button. After doing either of these, restart Firefox.

So, if for some reason, about:config stopped working on Firefox, let us get right into the best fixes.

Quick Tip:

There is a better alternative to resolve this configuration issue on your browser, namely using one like Opera One.

With this browser, you can not only avoid this error but get smooth and quicker navigation on your web pages, plus enhanced privacy with the built-in VPN, Ad blocker and AI.

Opera One

How do I fix about config not working in Firefox?

1. Restore Firefox to Default

2. Switch to the Beta or Nightly version

3. Uninstall and reinstall Firefox

Users have said a reinstallation is effective if Firefox is misbehaving after an update, so we recommend you try this.

Does about:config work on Firefox Mobile?

Yes, about:config works on Firefox mobile. In the previous version, about config can be accessed on Firefox Daylight (Fenix) application.

But now, you can access about:config in the Nightly build of Firefox for Android, available from the Google Play store through Firefox Beta.

In case you’re still having issues, we encourage you to visit ourFirefox is not responding in Windows 10 and 11 guidefor more solutions.

Leave your questions and suggestions below in the comments section. We’d like to hear from you.

About:Config Not Working? 3 Different Ways to Fix it#

Why is about:config not working in Firefox?#

Opera One#

How do I fix about config not working in Firefox?#

1. Restore Firefox to Default#

2. Switch to the Beta or Nightly version#

3. Uninstall and reinstall Firefox#

Does about:config work on Firefox Mobile?#