DOM Property Viewer

The DOM Property Viewer is new in Firefox 48. It is disabled by default. Enable it in the Developer Tools Settings

The DOM Property Viewer lets you inspect the properties of the DOM as an expandable tree structure, starting from the window object of the current page or the selected iframe.

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Enabling the DOM Property Viewer

The DOM Property Viewer is not enabled by default. To enable it, open the developer tools settings and check the “DOM” box under “Default Firefox Developer Tools”.

Opening the DOM Property Viewer

Once enabled, you can select the DOM panel in the Web Developer Tools, accessible from the Browser Tools submenu

The Toolbox will appear at the bottom of the browser window, with the DOM Property Viewer activated. It’s just called “DOM” in the Toolbox.

DOM Property Viewer user interface

DOM tree

The different properties of the DOM are displayed as an expandable tree. The left-hand side shows the property’s name, and the right-hand side shows its value. Up to three properties of an object and items of an array are displayed. If a property has more elements than this, you’ll see a “more…” annotation, and will need to click the property to see all elements. A lock icon indicates that a property is not writable.

Refreshing the display

If the DOM changes you can hit the Refresh button to update the display:

Button to update the DOM Inspector display

Filtering

There is a search box within the toolbar:

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This filters the list to show only items which match the search term. Items match the search term if their name contains the search term. Matching is case-sensitive.