Hover Zoom for Facebook

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "Hover Zoom for Facebook",
  "version": "1.0",
  "description": "__MSG_application_description__",
  "manifest_version": 2,
  "default_locale": "en",
  "icons": {
    "16": "images/icon16.png",
    "32": "images/icon32.png",
    "48": "images/icon48.png",
    "128": "images/icon128.png"
  },
  "minimum_chrome_version": "22",
  "background": {
    "persistent": true,
    "scripts": [
      "/js/update-conf.js",
      "/js/update.js"
    ]
  },
  "browser_action": {
    "default_icon": {
      "19": "images/icon19.png"
    },
    "default_popup": "popup.html",
    "default_title": "__MSG_application_description__"
  },
  "permissions": [
    "*://*/*",
    "unlimitedStorage"
  ],
  "optional_permissions": [
    "history",
    "tabs"
  ],
  "web_accessible_resources": [
    "images/loading.gif"
  ],
  "content_scripts": [
    {
      "js": [
        "js/libs/jquery-3.2.1.js",
        "js/plugins.js",
        "js/hoverzoom.js"
      ],
      "matches": [
        "<all_urls>"
      ],
      "all_frames": true
    },
    {
      "js": [
        "plugins/facebook.js"
      ],
      "matches": [
        "*://*.facebook.com/*"
      ],
      "all_frames": true
    }
  ]
}