devtools.panels.ExtensionSidebarPane

Functions

devtools.panels.ExtensionSidebarPane.setExpression(): Evaluate a JavaScript expression in the web page that the inspector is inspecting. The result is displayed in the sidebar pane.
devtools.panels.ExtensionSidebarPane.setObject(): Sets a JSON object that will be displayed in the sidebar pane.
devtools.panels.ExtensionSidebarPane.setPage(): Loads the page pointed to by the supplied URL.

Events

devtools.panels.ExtensionSidebarPane.onShown: Fired when the sidebar pane is shown.
devtools.panels.ExtensionSidebarPane.onHidden: Fired when the sidebar pane is hidden.

Browser compatibility

	desktop					mobile
	Chrome	Edge	Firefox	Opera	Safari	Firefox for Android	Safari on iOS
`ExtensionSidebarPane`	Chrome – Full support Chrome 18 (Release date: 2012-03-28) footnote Full support	Edge – Full support Edge 79 (Release date: 2020-01-15) footnote Full support	Firefox – Full support Firefox 57 (Release date: 2017-11-14) footnote Full support	Opera – Full support Opera 15 (Release date: 2013-07-02) footnote Full support	Safari – No support Safari footnote No support	Firefox for Android – No support Firefox for Android footnote No support	Safari on iOS – No support Safari on iOS footnote No support
`onHidden`	Chrome – Full support Chrome 18 (Release date: 2012-03-28) footnote Full support	Edge – Full support Edge 79 (Release date: 2020-01-15) footnote Full support	Firefox – Full support Firefox 57 (Release date: 2017-11-14) footnote footnote This event is only fired when the user switches between sidebar panes, not when the user switches between devtools panels. See bug 1412317.	Opera – Full support Opera 15 (Release date: 2013-07-02) footnote Full support	Safari – No support Safari footnote No support	Firefox for Android – No support Firefox for Android footnote No support	Safari on iOS – No support Safari on iOS footnote No support
`onShown`	Chrome – Full support Chrome 18 (Release date: 2012-03-28) footnote Full support	Edge – Full support Edge 79 (Release date: 2020-01-15) footnote Full support	Firefox – Full support Firefox 57 (Release date: 2017-11-14) footnote footnote This event is only fired when the user switches between sidebar panes, not when the user switches between devtools panels. See bug 1412317.	Opera – Full support Opera 15 (Release date: 2013-07-02) footnote Full support	Safari – No support Safari footnote No support	Firefox for Android – No support Firefox for Android footnote No support	Safari on iOS – No support Safari on iOS footnote No support
`setExpression`	Chrome – Full support Chrome 18 (Release date: 2012-03-28) footnote footnote The expression must evaluate to a JavaScript object or a DOM node, or nothing is shown in the sidebar.	Edge – Full support Edge 79 (Release date: 2020-01-15) footnote footnote The expression must evaluate to a JavaScript object or a DOM node, or nothing is shown in the sidebar.	Firefox – Full support Firefox 57 (Release date: 2017-11-14) footnote footnote Before Firefox 60, the expression must evaluate to an object that can be serialized to JSON, or nothing was shown in the sidebar. In particular, JavaScript cyclic objects and DOM nodes were not supported. See bug 1403130.	Opera – Full support Opera 15 (Release date: 2013-07-02) footnote footnote The expression must evaluate to a JavaScript object or a DOM node, or nothing is shown in the sidebar.	Safari – No support Safari footnote No support	Firefox for Android – No support Firefox for Android footnote No support	Safari on iOS – No support Safari on iOS footnote No support
`setHeight`	Chrome – Full support Chrome 18 (Release date: 2012-03-28) footnote Full support	Edge – Full support Edge 79 (Release date: 2020-01-15) footnote Full support	Firefox – No support Firefox footnote No support	Opera – Full support Opera 15 (Release date: 2013-07-02) footnote Full support	Safari – No support Safari footnote No support	Firefox for Android – No support Firefox for Android footnote No support	Safari on iOS – No support Safari on iOS footnote No support
`setObject`	Chrome – Full support Chrome 18 (Release date: 2012-03-28) footnote footnote If the `jsonObject` parameter is a string, it is not displayed.	Edge – Full support Edge 79 (Release date: 2020-01-15) footnote footnote If the `jsonObject` parameter is a string, it is not displayed.	Firefox – Full support Firefox 57 (Release date: 2017-11-14) footnote footnote If the `jsonObject` is a string, then `rootTitle` must also be given, or `jsonObject` will not be displayed. See bug 1412310.	Opera – Full support Opera 15 (Release date: 2013-07-02) footnote footnote If the `jsonObject` parameter is a string, it is not displayed.	Safari – No support Safari footnote No support	Firefox for Android – No support Firefox for Android footnote No support	Safari on iOS – No support Safari on iOS footnote No support
`setPage`	Chrome – Full support Chrome 18 (Release date: 2012-03-28) footnote Full support	Edge – Full support Edge 79 (Release date: 2020-01-15) footnote Full support	Firefox – Full support Firefox 57 (Release date: 2017-11-14) footnote Full support	Opera – Full support Opera 15 (Release date: 2013-07-02) footnote Full support	Safari – No support Safari footnote No support	Firefox for Android – No support Firefox for Android footnote No support	Safari on iOS – No support Safari on iOS footnote No support

Tip: you can click/tap on a cell for more information.

Full support: Full support
No support: No support
: See implementation notes.

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

This page was last modified on Jul 17, 2025 by MDN contributors.

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Functions

Events

Browser compatibility

Legend