Examine source code of qr

{
  "manifest_version": 2,
  "name": "qr",
  "version": "1.0.2020.190",
  "description": "__MSG_extDescr__",
  "author": "XA",
  "homepage_url": "http://my.opera.com/XAntares/",
  "options_page": "options.html",
  "default_locale": "en",
  "icons": {
    "16": "icons/qr-16x16.png",
    "48": "icons/qr-48x48.png",
    "128": "icons/qr-128x128.png"
  },
  "background": {
    "persistent": false,
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": {
      "19": "icons/qrmu-19x19.png"
    },
    "default_title": "__MSG_act_titleDefault__",
    "default_popup": "popup/popup.html"
  },
  "commands": {
    "_execute_browser_action": {
      "suggested_key": {
        "default": "Ctrl+Shift+Y"
      },
      "description": "__MSG_cmd_titleBrowserAction__"
    }
  },
  "offline_enabled": true,
  "permissions": [
    "activeTab",
    "contextMenus"
  ]
}