Examine source code of Broken Mouse Wheel

{
  "name": "Broken Mouse Wheel",
  "version": "0.0.8resigned1",
  "manifest_version": 2,
  "description": "Broken Mouse Wheel",
  "homepage_url": "http://kenocell.com/",
  "icons": {
    "16": "icons/icon16.png",
    "19": "icons/icon19.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "default_locale": "en",
  "browser_action": {
    "default_icon": "icons/icon19.png",
    "default_title": "Broken Mouse Wheel",
    "default_popup": "src/browser_action/browser_action.html"
  },
  "permissions": [
    "contextMenus",
    "activeTab",
    "http://localhost/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>",
        "https://*/*",
        "http://*/*"
      ],
      "js": [
        "src/inject/inject.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{5a54f2bf-f486-4138-bc03-e503eb347a3e}"
    }
  }
}