`Status` can be "default", "locked", "user" or "clear"
-Default preferences can be modified by the user.
+* `"default"`: Read/Write: Settings appear as default even if factory default differs.
+* `"locked"`: Read-Only: Settings appear as default even if factory default differs.
+* `"user"`: Read/Write: Settings appear as changed if it differs from factory default.
+* `"clear"`: Read/Write: `Value` has no effect. Resets to factory defaults on each startup.
-If a value is locked, it is also set as the default.
+`"user"` preferences persist across invocations of Firefox. It is the equivalent of a user setting the preference. They are most useful when a preference is needed very early in startup so it can't be set as default by policy. An example of this is ```toolkit.legacyUserProfileCustomizations.stylesheets```.
-User preferences persist across invocations of Firefox. It is the equivalent of a user setting the preference. They are most useful when a preference is needed very early in startup so it can't be set as default by policy. An example of this is ```toolkit.legacyUserProfileCustomizations.stylesheets```.
-
-User preferences persist even if the policy is removed, so if you need to remove them, you should use the clear policy.
+`"user"` preferences persist even if the policy is removed, so if you need to remove them, you should use the clear policy.
See the examples below for more detail.