Examine source code of Toggle Proxy

{
  "name" : "Toggle Proxy",
  "description" : "__MSG_manifest_description__" ,
  "version" : "1.6.11",
  "manifest_version" : 2 ,
  "author": "Indogermane",
  "default_locale" : "en" ,
  "icons" : {
    "290" : "_images/icon.png"
  },
  "permissions" : [
    "proxy" ,
    "storage" ,
    "tabs" ,
    "webRequest" 
  ],
  "browser_action" : {
    "default_icon" : "_images/unsafe.png",
    "default_title" : "Turn on proxy"
  },
  "page_action" : {
    "default_icon" : "_images/safe.png",
    "default_title" : "Proxy enabled on this page",
    "show_matches": [
      "<all_urls>"
    ]
  },
  "background" : {
    "scripts" : [
      "src/background/background.js" 
    ]
  },
  "options_ui" : {
    "page": "src/options/options.html" 
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "ToggleProxy@Indogermane",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  }
}