Examine source code of CMeter

{
  "manifest_version" : 3 ,
  "name" : "CMeter",
  "description" : "Activates Content Meter library for web-pages.",
  "version" : "0.6.92",
  "icons" : {
    "16" : "icon_16.png",
    "48" : "icon_48.png",
    "128" : "icon_128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{3cb0155f-44ef-4c3d-954f-f15c24ddb4fc}",
      "strict_min_version": "58.0",
      "data_collection_permissions": {
        "required": [
          "browsingActivity",
          "websiteActivity"
        ]
      }
    }
  },
  "homepage_url" : "https://panel.kantar.lt/user/product/plugin",
  "content_scripts" : [
    {
      "matches" : [
        "<all_urls>" 
      ],
      "match_about_blank" : false ,
      "all_frames" : true ,
      "run_at" : "document_end" ,
      "js" : [
        "init.js" ,
        "modules/storageSync.js" 
      ]
    }
  ],
  "content_security_policy" : {
    "extension_pages": "script-src 'self'; object-src 'self'"
  },
  "web_accessible_resources" : [
    {
      "resources" : [
        "dist/*.js" ,
        "addonParams.js" 
      ],
      "matches" : [
        "<all_urls>" 
      ]
    }
  ],
  "host_permissions" : [
    "<all_urls>" 
  ],
  "permissions" : [
    "activeTab" ,
    "tabs" ,
    "storage" ,
    "webRequest" ,
    "webNavigation" ,
    "scripting" ,
    "declarativeNetRequest" ,
    "declarativeNetRequestWithHostAccess" 
  ],
  "background" : {
    "scripts" : [
      "modules/httpListener.js" ,
      "modules/utils.js" ,
      "modules/defaultConfig.js" ,
      "modules/storageSync.js" ,
      "modules/PixelAudit.js" ,
      "background.js" 
    ]
  }
}