{"json_modified": "2016-09-18T19:38:23.870412", "uuid": "3454c026-60de-4085-b08d-8353df9d2326", "title": "windows.onFocusChanged", "url": "/en-US/docs/Mozilla/Add-ons/WebExtensions/API/windows/onFocusChanged", "tags": ["API", "Non-Standard", "Reference", "Event", "Non-standard", "Windows", "Extensions", "Add-ons", "WebExtensions", "windows", "onFocusChanged", "add-ons"], "translations": [], "modified": "2016-09-18T19:38:23", "label": "windows.onFocusChanged", "localization_tags": [], "locale": "en-US", "id": 172345, "last_edit": "2016-09-18T19:07:34", "summary": "Fired when the currently focused window changes. Will be <a href=\"/en-US/docs/Mozilla/Add-ons/WebExtensions/API/windows/WINDOW_ID_NONE\" title=\"The windowId value that represents the absence of a browser window.\"><code>windows.WINDOW_ID_NONE</code></a> if all browser windows have lost focus.", "sections": [{"id": "Quick_Links", "title": null}, {"id": "Syntax", "title": "Syntax"}, {"id": "addListener_syntax", "title": "addListener syntax"}, {"id": "Parameters", "title": "Parameters"}, {"id": "Browser_compatibility", "title": "Browser compatibility"}, {"id": "Examples", "title": "Examples"}], "slug": "Mozilla/Add-ons/WebExtensions/API/windows/onFocusChanged", "review_tags": []}