Examine source code of Spoiler Slayer

{
  "manifest_version": 2,
  "name": "Spoiler Slayer",
  "short_name": "SpoilerSlayer",
  "description": "A customizable spoiler blocking plugin with support for Facebook, Reddit, Twitter, Google News, and many more sites!",
  "version": "1.1.1resigned1",
  "author": "Brett Profitt",
  "homepage_url": "https://www.github.com/brettp/spoiler-slayer",
  "browser_action": {
    "default_icon": "assets/icons/battered-axe-48.png",
    "default_popup": "popup.html",
    "default_title": "Spoiler Slayer"
  },
  "icons": {
    "16": "assets/icons/battered-axe-16.png",
    "32": "assets/icons/battered-axe-32.png",
    "48": "assets/icons/battered-axe-48.png",
    "64": "assets/icons/battered-axe-64.png",
    "96": "assets/icons/battered-axe-96.png",
    "128": "assets/icons/battered-axe-128.png",
    "256": "assets/icons/battered-axe-256.png"
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "background": {
    "scripts": [
      "scripts/lib/msgApi.js",
      "scripts/lib/helpers.js",
      "scripts/lib/models.js",
      "scripts/lib/settings.js",
      "scripts/background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "run_at": "document_idle",
      "css": [
        "styles/content.css"
      ],
      "js": [
        "scripts/lib/msgApi.js",
        "scripts/lib/helpers.js",
        "scripts/content.js"
      ]
    }
  ],
  "permissions": [
    "tabs",
    "activeTab",
    "storage",
    "downloads",
    "alarms",
    "https://*.github.com/",
    "https://*.gitlab.com/"
  ],
  "content_security_policy": "script-src 'self' https://ssl.google-analytics.com; object-src 'self'; connect-src 'self' localhost:* ws://localhost:* https://*.github.com https://*.githubusercontent.com https://*.gitlab.com https://gitlab.com",
  "applications": {
    "gecko": {
      "id": "spoilerslayer@brettp.github.io"
    }
  }
}