Examine source code of Outline Panel

{
  "manifest_version": 2,
  "name": "Outline Panel",
  "version": "1.0",
  "icons": {
    "32": "icon.svg"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "outline-panel@jacobwinters.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "sidebar_action": {
    "default_title": "Outline",
    "default_panel": "sidebar.xhtml",
    "default_icon": "icon.svg"
  },
  "browser_action": {
    "default_area": "navbar"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "<all_urls>",
    "webNavigation"
  ]
}