Examine source code of Github Aid - repo file size

{
  "manifest_version" : 3 ,
  "name" : "Github Aid - displays repo file sizes",
  "short_name" : "Github Aid",
  "content_scripts" : [
    {
      "matches" : [
        "*://github.com/*" 
      ],
      "js" : [
        "./js/content_script_extension_adapter.js" 
      ]
    }
  ],
  "web_accessible_resources" : [
    {
      "resources" : [
        "*.js" 
      ],
      "matches" : [
        "*://github.com/*" 
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "github_aid@temp.com"
    }
  },
  "icons" : {
    "16" : "./icon/eldercat_16.png",
    "32" : "./icon/eldercat_32.png",
    "48" : "./icon/eldercat_48.png",
    "64" : "./icon/eldercat_64.png",
    "128" : "./icon/eldercat_128.png",
    "256" : "./icon/eldercat_256.png"
  },
  "options_ui" : {
    "page": "./html/option.html" ,
    "open_in_tab": false
  },
  "permissions" : [
    "storage" 
  ],
  "content_security_policy" : {
    "extension_pages": "script-src 'self'; object-src 'self';"
  },
  "action" : {
    "default_icon" : {
      "16" : "./icon/eldercat_16.png",
      "32" : "./icon/eldercat_32.png",
      "48" : "./icon/eldercat_48.png",
      "64" : "./icon/eldercat_64.png",
      "128" : "./icon/eldercat_128.png",
      "256" : "./icon/eldercat_256.png"
    },
    "default_popup" : "./html/option.html",
    "default_title" : "Github Aid"
  },
  "author": "Omar Azmi",
  "version" : "0.1.2",
  "description" : "Displays github repository file and folder sizes. Supports GraphQL and REST api modes. Also mobile friendly.",
  "homepage_url" : "https://github.com/omar-azmi/github_aid_ts"
}