Examine source code of WebControl

{
  "manifest_version": 2,
  "name": "WebControl",
  "version": "1.1.1resigned1",
  "applications": {
    "gecko": {
      "id": "{84c4ad14-04f5-4775-8720-c44c352b3527}",
      "strict_min_version": "51.0"
    }
  },
  "permissions": [
    "downloads",
    "tabs",
    "storage",
    "<all_urls>",
    "webRequest",
    "webRequestBlocking"
  ],
  "description": "Blacklist domains from running scripts, videos, and more.",
  "homepage_url": "https://github.com/wxMichael/WebControl",
  "icons": {
    "32": "icons/HTML5_Badge_32.png"
  },
  "options_ui": {
    "browser_style": true,
    "open_in_tab": true,
    "page": "html/options.html"
  },
  "browser_action": {
    "default_icon": "icons/HTML5_Badge_32.png",
    "default_title": "WebControl",
    "default_popup": "html/popup.html"
  },
  "background": {
    "scripts": [
      "js/background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "run_at": "document_start",
      "js": [
        "js/content.js"
      ]
    }
  ]
}