James Wilcox () from Mozilla change with the implementation of the parameter and settings , allowing control over access to the about:config page in (the Firefox engine variant for the Android platform). This setting will enable creators of embedded mobile browsers using the GeckoView-based engine to disable access to about:config by default if needed, while allowing users to restore access.
The ability to disable access to about:config is included in the codebase of Firefox release 71, scheduled for December 3. The issue is being considered to default about:config in some versions of the mobile browser Fenix (Firefox Preview), which continues to develop Firefox for Android. However, to manage access to about:config in Fenix, the aboutConfigEnabled setting allows restoring access to about:config if necessary.
As a reason for wanting to limit access to about:config, the situation is mentioned where careless changes in about:config in Fennec (the old Firefox for Android) could easily render the browser unusable. According to the initiator of the change, users should not be given access to unsafe methods of altering Gecko engine parameters. Also suggested were options to block dangerous settings through the introduction of a whitelist of modifiable parameters, or to add a new section 'about:features' for managing the enabling of experimental capabilities.
Source: opennet.ru
