Examine source code of Policy Control - JavaScript and Flash blocker

{
  "manifest_version": 2,
  "version": "0.3.6resigned1",
  "name": "Policy Control - JavaScript and Flash blocker",
  "description": "Block third-party or all resources of style, script, image, font, xmlhttprequest types",
  "permissions": [
    "*://*/*",
    "storage",
    "tabs",
    "webRequest",
    "webRequestBlocking"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "icons": {
    "16": "/data/icons/16.png",
    "20": "/data/icons/20.png",
    "24": "/data/icons/24.png",
    "32": "/data/icons/32.png",
    "48": "/data/icons/48.png",
    "64": "/data/icons/64.png",
    "128": "/data/icons/128.png",
    "256": "/data/icons/256.png"
  },
  "browser_action": {
    "default_popup": "data/popup/index.html",
    "default_icon": {
      "16": "/data/icons/16.png",
      "20": "/data/icons/20.png",
      "24": "/data/icons/24.png",
      "32": "/data/icons/32.png",
      "48": "/data/icons/48.png",
      "64": "/data/icons/64.png"
    }
  },
  "options_ui": {
    "page": "data/options/index.html",
    "chrome_style": true
  },
  "homepage_url": "http://add0n.com/policy-control.html",
  "applications": {
    "gecko": {
      "id": "jid1-gHwvGmJ8Ii9oOq@jetpack",
      "strict_min_version": "52.0"
    }
  }
}