Examine source code of Distraction Blocker

{
  "manifest_version": 2,
  "name": "Distraction Blocker",
  "version": "1.0",
  "description": "Block popups, ads, and unnecessary animations.",
  "permissions": [
    "activeTab",
    "tabs"
  ],
  "browser_action": {
    "default_title": "Distraction Blocker",
    "default_popup": "popup.html"
  },
  "icons": {
    "48": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{c58e46a3-a161-4a8f-8364-cd8c77404ce9}"
    }
  }
}