Examine source code of bookay

{
  "manifest_version": 2,
  "name": "bookay",
  "short_name": "bookay",
  "version": "1.0.1",
  "description": "bookay browser plugin",
  "homepage_url": "https://github.com/jaynetics/bookay",
  "background": {
    "page": "background/background.html",
    "persistent": true
  },
  "browser_action": {
    "default_icon": {
      "16": "assets/icon-16.png",
      "19": "assets/icon-19.png",
      "32": "assets/icon-32.png",
      "38": "assets/icon-38.png",
      "48": "assets/icon-48.png",
      "64": "assets/icon-64.png"
    },
    "default_popup": "popup/popup.html",
    "default_title": "bookay"
  },
  "commands": {
    "_execute_browser_action": {
      "suggested_key": {
        "default": "Ctrl+Shift+E",
        "windows": "Ctrl+Shift+E",
        "mac": "Command+Shift+E",
        "chromeos": "Ctrl+Shift+E",
        "linux": "Ctrl+Shift+E"
      }
    }
  },
  "options_ui": {
    "open_in_tab": true,
    "page": "options/options.html"
  },
  "content_security_policy": "script-src 'self'; object-src 'self'",
  "permissions": [
    "storage",
    "tabs"
  ],
  "icons": {
    "16": "assets/icon-16.png",
    "32": "assets/icon-32.png",
    "48": "assets/icon-48.png",
    "96": "assets/icon-96.png",
    "128": "assets/icon-128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "janosch84@gmail.com",
      "strict_min_version": "68.0"
    }
  }
}