Examine source code of Simple Porn Blocker

{
  "manifest_version": 2,
  "name": "Porn Blocker",
  "version": "1.1",
  "description": "Simple extension that blocks pornographic sites and pages by scanning the URL for certain words. Easily add and remove websites and keywords to block.",
  "icons": {
    "48": "icons/my_icon.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content_script.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "background/background_script.js"
    ]
  },
  "options_ui": {
    "page": "options/options.html",
    "browser_style": true
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{e1519176-502c-4246-ba57-75be7fd4d907}"
    }
  },
  "permissions": [
    "storage",
    "tabs"
  ],
  "browser_action": {
    "default_icon": "icons/my_icon.png",
    "default_title": "NSFW Blocker",
    "default_popup": "browser_action/view.html"
  }
}