sidebar_action

"sidebar_action": {
  "default_icon": {
    "16": "button/geo-16.png",
    "32": "button/geo-32.png"
  },
  "default_title": "My sidebar",
  "default_panel": "sidebar/sidebar.html"
}

Optional, defaulting to true.

Use this to include a stylesheet in your popup that will make it look consistent with the browser's UI and with other extensions that use the browser_style property.

Use this to specify one or more icons for the sidebar. The icon is shown in the browser's UI for opening and closing sidebars.

Icons are specified as URLs relative to the manifest.json file itself.

You can specify a single icon file by supplying a string here:

"default_icon": "path/to/geo.svg"

To specify multiple icons in different sizes, specify an object here. The name of each property is the icon's height in pixels, and must be convertible to an integer. The value is the URL. For example:

    "default_icon": {
      "16": "path/to/geo-16.png",
      "32": "path/to/geo-32.png"
    }

See Choosing icon sizes for more guidance on this.

This property is optional: if it is omitted, the sidebar doesn't get an icon.

The path to an HTML file that specifies the sidebar's contents.

The HTML file may include CSS and JavaScript files using <link> and <script> elements, just like a normal web page.

Unlike a normal web page, JavaScript running in the panel can access all the WebExtension APIs (subject, of course, to the extension having the appropriate permissions).

This property is mandatory.

This is a localizable property.

Title for the sidebar. This is used in the browser UI for listing and opening sidebars, and is displayed at the top of the sidebar when it is open.

This property is optional: if it is omitted, the sidebar's title is the extension's name.

This is a localizable property.