Examine source code of PhishWall

{
  "author": "SecureBrain",
  "background": {
    "persistent": true,
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": {
      "20": "icon20.png",
      "48": "icon48.png"
    },
    "default_title": "PhishWall"
  },
  "description": "PhishWall Extension",
  "icons": {
    "20": "icon20.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "manifest_version": 2,
  "name": "PhishWall",
  "permissions": [
    "tabs",
    "cookies",
    "webRequest",
    "webRequestBlocking",
    "http://*/*",
    "https://*/*"
  ],
  "version": "6.1.43.0",
  "browser_specific_settings": {
    "gecko": {
      "id": "info.asia@securebrain.co.jp"
    }
  }
}