Examine source code of Multicopy

{
  "manifest_version": 2,
  "name": "Multicopy",
  "description": "Copy multiple texts and do multiple pastes from right click menu",
  "version": "1.0.1resigned1",
  "applications": {
    "gecko": {
      "id": "multicopy@trishul"
    }
  },
  "icons": {
    "32": "icons/icon_32.png",
    "64": "icons/icon_64.png",
    "128": "icons/icon_128.png"
  },
  "background": {
    "scripts": [
      "polyfill.js",
      "bg.js"
    ]
  },
  "options_ui": {
    "page": "options.html",
    "browser_style": true
  },
  "permissions": [
    "contextMenus",
    "activeTab",
    "notifications",
    "storage",
    "clipboardWrite"
  ],
  "web_accessible_resources": [
    "icons/icon_64.png"
  ]
}