Examine source code of Tracker Beeper

{
  "manifest_version": 2,
  "name": "Tracker Beeper",
  "version": "0.1.3",
  "description": "Beeps every time you connect to a tracker, currently mostly Google and Facebook",
  "developer": {
    "name": "defkev"
  },
  "applications": {
    "gecko": {
      "id": "tracker-beeper@defkev",
      "strict_min_version": "54.0"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_area": "tabstrip",
    "default_title": "Tracker Beeper"
  },
  "options_ui": {
    "page": "options.html"
  },
  "permissions": [
    "<all_urls>",
    "alarms",
    "storage",
    "tabs",
    "webRequest"
  ]
}