Examine source code of IdBloc

{
  "name": "__MSG_appName__",
  "description": "__MSG_appDescription__",
  "version": "0.0.7",
  "short_name": "__MSG_appShortName__",
  "manifest_version": 2,
  "default_locale": "en",
  "icons": {
    "16": "images/icon-16.png",
    "128": "images/icon-128.png"
  },
  "background": {
    "scripts": [
      "scripts/background.js"
    ]
  },
  "browser_action": {
    "default_icon": {
      "19": "images/icon-19.png",
      "38": "images/icon-38.png"
    },
    "default_title": "__MSG_browserActionTitle__",
    "default_popup": "pages/popup.html"
  },
  "permissions": [
    "activeTab",
    "https://idbloc.co/*",
    "storage"
  ],
  "optional_permissions": [
    "clipboardWrite"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{31ac4759-2f49-4633-a2fe-0649fa40ff9c}"
    }
  }
}