Although the APIs are based on the Chrome devtools APIs, there are still many features that are not yet implemented in Firefox, and therefore are not documented here. To see which features are currently missing please see Limitations of the devtools APIs.

The devtools.panels API lets a devtools extension define its user interface inside the devtools window.

The devtools window hosts a number of separate tools - the JavaScript Debugger, Network Monitor, and so on. A row of tabs across the top lets the user switch between the different tools. The window hosting each tool's user interface is called a "panel".

With the devtools.panels API you can create new panels in the devtools window.

Like all the devtools APIs, this API is only available to code running in the document defined in the devtools_page manifest.json key, or in other devtools documents created by the extension (such as the panel's own document). See Extending the developer tools for more.

Types

devtools.panels.ElementsPanel
Represents the HTML/CSS inspector in the browser's devtools.
devtools.panels.ExtensionPanel
Represents a devtools panel created by the extension.

Properties

devtools.panels.elements
A reference to an ElementsPanel object.
devtools.panels.themeName
The name of the current devtools theme.

Functions

devtools.panels.create()
Creates a new devtools panel.

Events

devtools.panels.onThemeChanged
Fired when the devtools theme changes.

Browser compatibility

ChromeEdgeFirefoxFirefox for AndroidOpera
create (Yes) No54 No (Yes)
elements (Yes) No56 No (Yes)
onThemeChanged No No55 No No
themeName54 No55 No41

Acknowledgements

This API is based on Chromium's chrome.devtools.panels API.

Microsoft Edge compatibility data is supplied by Microsoft Corporation and is included here under the Creative Commons Attribution 3.0 United States License.

Document Tags and Contributors

 Contributors to this page: wbamberg, andrewtruongmoz
 Last updated by: wbamberg,