Examine source code of DeepNode Download Manager - Browser Integration

{
  "manifest_version": 3,
  "name": "__MSG_extName__",
  "version": "1.5.1",
  "description": "__MSG_extDesc__",
  "default_locale": "en",
  "permissions": [
    "downloads",
    "contextMenus",
    "storage",
    "webRequest",
    "cookies",
    "notifications",
    "alarms"
  ],
  "host_permissions": [
    "<all_urls>",
    "http://localhost/*",
    "http://127.0.0.1/*"
  ],
  "background": {
    "scripts": [
      "strings.js",
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "deepnode-dlm@deepnodestudios.com",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  },
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icon16.png",
      "32": "icon32.png",
      "48": "icon48.png",
      "128": "icon128.png"
    }
  },
  "icons": {
    "16": "icon16.png",
    "32": "icon32.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "inject.js"
      ],
      "world": "MAIN",
      "all_frames": true,
      "run_at": "document_start"
    },
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "strings.js",
        "content.js"
      ],
      "css": [
        "content.css"
      ],
      "all_frames": true,
      "run_at": "document_idle"
    }
  ]
}