Examine source code of blindspot-privacy

{
  "manifest_version": 2,
  "name": "Blindspot",
  "version": "1.0.0",
  "description": "Pause your browsing history with one click. Add sites you never want recorded.",
  "permissions": [
    "history",
    "sessions",
    "storage",
    "tabs",
    "contextMenus"
  ],
  "browser_action": {
    "default_icon": {
      "48": "icons/icon-48.svg"
    },
    "default_title": "Blindspot — Click to pause history"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "options_ui": {
    "page": "options/options.html",
    "open_in_tab": true
  },
  "icons": {
    "48": "icons/icon-48.svg",
    "96": "icons/icon-96.svg"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "blindspot@bastian",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  }
}