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.
devtools.panels.ExtensionSidebarPane- Represents a pane that an extension has added to the HTML/CSS inspector in the browser's devtools.
Properties
devtools.panels.elements- A reference to an
ElementsPanelobject. 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.
Example extensions
Browser compatibility
Update compatibility data on GitHub
| Desktop | Mobile | |||||
|---|---|---|---|---|---|---|
ElementsPanel.createSidebarPane | Chrome Full support Yes | Edge Full support 79 | Firefox Full support 57 | Opera Full support Yes | Safari No support No | Firefox Android No support No |
ElementsPanel.onSelectionChanged | Chrome Full support Yes | Edge Full support 79 | Firefox Full support 56 | Opera Full support Yes | Safari No support No | Firefox Android No support No |
ExtensionPanel.onHidden | Chrome Full support Yes | Edge Full support 79 | Firefox Full support 54 | Opera Full support Yes | Safari No support No | Firefox Android No support No |
ExtensionPanel.onSearch | Chrome Full support Yes | Edge Full support 79 | Firefox No support No | Opera Full support Yes | Safari No support No | Firefox Android No support No |
ExtensionPanel.onShown | Chrome Full support Yes | Edge Full support 79 | Firefox Full support 54 | Opera Full support Yes | Safari No support No | Firefox Android No support No |
ExtensionSidebarPane.onHidden | Chrome Full support Yes | Edge Full support 79 | Firefox
Full support
57
| Opera Full support Yes | Safari No support No | Firefox Android No support No |
ExtensionSidebarPane.onShown | Chrome Full support Yes | Edge Full support 79 | Firefox
Full support
57
| Opera Full support Yes | Safari No support No | Firefox Android No support No |
ExtensionSidebarPane.setExpression | Chrome
Full support
Yes
| Edge
Full support
79
| Firefox
Full support
57
| Opera Full support Yes | Safari No support No | Firefox Android No support No |
ExtensionSidebarPane.setObject | Chrome
Full support
Yes
| Edge
Full support
79
| Firefox
Full support
57
| Opera Full support Yes | Safari No support No | Firefox Android No support No |
create | Chrome Full support Yes | Edge Full support 79 | Firefox Full support 54 | Opera Full support Yes | Safari No support No | Firefox Android No support No |
elements | Chrome Full support Yes | Edge Full support 79 | Firefox Full support 56 | Opera Full support Yes | Safari No support No | Firefox Android No support No |
onThemeChanged | Chrome No support No | Edge No support No | Firefox Full support 55 | Opera No support No | Safari No support No | Firefox Android No support No |
themeName | Chrome Full support 54 | Edge Full support 79 | Firefox Full support 55 | Opera Full support 41 | Safari No support No | Firefox Android No support No |
Legend
- Full support
- Full support
- No support
- No support
- See implementation notes.
- See implementation notes.
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.
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