Examine source code of Reddit Keyword Filter

{
  "manifest_version": 2,
  "name": "Reddit Keyword Filter",
  "version": "1.0",
  "description": "Filters out Reddit posts containing specific keywords.",
  "permissions": [
    "storage"
  ],
  "browser_action": {
    "default_popup": "options.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "32": "icons/icon32.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://www.reddit.com/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "applications": {
    "gecko": {
      "id": "mattias@raver.dk",
      "strict_min_version": "91.0"
    }
  }
}