{"json_modified": "2016-03-28T08:27:47.026184", "uuid": "78696afa-a020-476c-96dc-7f7346f5675e", "title": "mozbrowserloadstart", "url": "/en-US/docs/Web/Events/mozbrowserloadstart", "tags": ["API", "Browser", "Reference", "Firefox OS", "Non-standard", "R\u00e9f\u00e9rence", "mozbrowserloadstart", "B2G"], "translations": [], "modified": "2015-11-12T12:26:07", "label": "mozbrowserloadstart", "localization_tags": [], "locale": "en-US", "id": 79055, "last_edit": "2015-11-12T12:26:04", "summary": "The <code>mozbrowserloadstart</code> event is fired when the browser <a href=\"/en-US/docs/Web/HTML/Element/iframe\" title=\"The&#xA0;HTML Inline Frame Element&#xA0;(&lt;iframe&gt;) represents a nested browsing context, effectively embedding another HTML page into the current page. In HTML 4.01, a document may contain a head and a body or a head and a frame-set, but not both a body and a frame-set. However, an &lt;iframe&gt; can be used within a normal document body. Each browsing context has its own session history and active document. The browsing context that contains the embedded content is called the parent browsing context. The top-level browsing context (which has no parent) is typically the browser window.\"><code>&lt;iframe&gt;</code></a> starts to load a new page.", "sections": [{"id": "General_info", "title": "General info"}, {"id": "Properties", "title": "Properties"}, {"id": "Example", "title": "Example"}, {"id": "Related_Events", "title": "Related Events"}, {"id": "See_also", "title": "See also"}], "slug": "Web/Events/mozbrowserloadstart", "review_tags": []}