Examine source code of Smart Proxy

{
  "manifest_version": 2,
  "name": "__MSG_extName__",
  "description": "__MSG_extDescription__",
  "version": "1.0.1",
  "default_locale": "en",
  "icons": {
    "16": "icons/earth-16.png",
    "48": "icons/earth-48.png",
    "128": "icons/earth-128.png"
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/earth-16.png",
      "48": "icons/earth-48.png",
      "128": "icons/earth-128.png"
    },
    "default_title": "__MSG_extName__"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "permissions": [
    "proxy",
    "storage",
    "tabs",
    "activeTab",
    "webRequest",
    "<all_urls>"
  ],
  "commands": {
    "toggle-proxy": {
      "description": "__MSG_toggleProxyCmd__",
      "suggested_key": {
        "default": "Ctrl+Shift+P",
        "mac": "Command+Shift+P"
      }
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "smart-proxy@extension",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      },
      "android_compatible": false
    }
  }
}