{"json_modified": "2016-03-28T07:53:14.645891", "uuid": "ba3f8d4e-d9b9-47ab-ab0d-05f72964536f", "title": "nsIPrefBranch2", "url": "/en-US/docs/Mozilla/Tech/XPCOM/Reference/Interface/nsIPrefBranch2", "tags": ["XPCOM Interface Reference", "Interfaces:Scriptable", "XPCOM", "Interfaces", "XPCOM API Reference"], "translations": [], "modified": "2014-04-14T10:42:09", "label": "nsIPrefBranch2", "localization_tags": [], "locale": "en-US", "id": 2726, "last_edit": "2014-04-14T10:42:08", "summary": "Add a preference change observer. On preference changes, the following arguments will be passed to <code><a href=\"https://developer.mozilla.org/en-US/docs/XPCOM_Interface_Reference/nsIObserver#observe()\">nsIObserver.observe()</a></code>:", "sections": [{"id": "Method_overview", "title": "Method overview"}, {"id": "Methods", "title": "Methods"}, {"id": "addObserver()", "title": "addObserver()"}, {"id": "Parameters", "title": "Parameters"}, {"id": "removeObserver()", "title": "removeObserver()"}, {"id": "Parameters", "title": "Parameters"}, {"id": "Remarks", "title": "Remarks"}], "slug": "Mozilla/Tech/XPCOM/Reference/Interface/nsIPrefBranch2", "review_tags": []}