Examine source code of Mobile DevTools

{
  "description" : "eruda developer tools",
  "manifest_version" : 3 ,
  "name" : "Eruda dev tools",
  "version" : "1.1",
  "homepage_url" : "https://trash.blog.ir/",
  "browser_specific_settings": {
    "gecko": {
      "id": "@eruda.mimv",
      "strict_min_version": "58.0"
    }
  },
  "background" : {
    "scripts" : [
      "background.js" 
    ]
  },
  "web_accessible_resources" : [
    {
      "resources" : [
        "eruda.js" 
      ],
      "matches" : [
        "<all_urls>" 
      ]
    }
  ],
  "icons" : {
    "16" : "icon.svg",
    "32" : "icon.svg",
    "48" : "icon.svg",
    "96" : "icon.svg"
  },
  "action" : {
    "default_icon" : "icon.svg",
    "default_title" : "dev tools"
  },
  "permissions" : [
    "activeTab" ,
    "scripting" 
  ]
}