ExtensionSidebarPane object represents a pane that an extension has added to the sidebar in the browser's HTML/CSS inspector.
To create an
ExtensionSidebarPane, call the
Sets a JSON object that will be displayed in the sidebar pane.
Loads the page pointed to by the supplied URL.
Fired when the sidebar pane is shown.
Fired when the sidebar pane is hidden.
BCD tables only load in the browser
Note: This API is based on Chromium's