Examine source code of Angry Blocker

{
  "manifest_version": 2,
  "name": "Angry Blocker",
  "description": "This extensions blocks angry and sad web pages. It protects you from the worst the internet has to offer.",
  "version": "0.2.4resigned1",
  "options_page": "options.html",
  "icons": {
    "16": "images/product-16.png",
    "32": "images/product-32.png",
    "48": "images/product-48.png",
    "128": "images/product-128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "web_accessible_resources": [
    "images/*.png",
    "images/*.jpg"
  ],
  "browser_action": {
    "default_title": "Angry Blocker",
    "default_icon": {
      "32": "images/icon-32.png"
    },
    "default_popup": "popup.html"
  },
  "applications": {
    "gecko": {
      "id": "angryblocker@emotions.tech"
    }
  },
  "permissions": [
    "storage",
    "activeTab",
    "http://*.emotions.tech/"
  ],
  "content_scripts": [
    {
      "css": [
        "content.css"
      ],
      "js": [
        "content.js"
      ],
      "matches": [
        "*://*.abcnews.go.com/*",
        "*://*.aljazeera.com/*",
        "*://*.bbc.co.uk/*",
        "*://*.bbc.com/*",
        "*://*.bloomberg.com/*",
        "*://*.cbs.com/*",
        "*://*.cbsnews.com/*",
        "*://*.cnn.com/*",
        "*://*.dailycaller.com/*",
        "*://*.dailymail.co.uk/*",
        "*://*.economist.com/*",
        "*://*.eonline.com/*",
        "*://*.espn.com/*",
        "*://*.facebook.com/*",
        "*://*.foxnews.com/*",
        "*://*.ft.com/*",
        "*://*.guardian.co.uk/*",
        "*://*.huffingtonpost.com/*",
        "*://*.independent.co.uk/*",
        "*://*.latimes.com/*",
        "*://*.mikebloomberg.com/*",
        "*://*.nbcnews.com/*",
        "*://*.newsmax.com/*",
        "*://*.newyorker.com/*",
        "*://*.npr.org/*",
        "*://*.nytimes.com/*",
        "*://*.pbs.org/*",
        "*://*.politico.com/*",
        "*://*.rt.com/*",
        "*://*.reuters.com/*",
        "*://*.news.sky.com/*",
        "*://*.skynews.com.au/*",
        "*://*.telegraph.co.uk/*",
        "*://*.theatlantic.com/*",
        "*://*.thedailybeast.com/*",
        "*://*.thesun.co.uk/*",
        "*://*.thetimes.co.uk/*",
        "*://*.time.com/*",
        "*://*.usatoday.com/*",
        "*://*.washingtonpost.com/*",
        "*://*.wnd.com/*",
        "*://*.wsj.com/*",
        "*://*.yahoo.com/news/*"
      ]
    }
  ]
}