Examine source code of Owl devtools

{
  "name": "Owl devtools",
  "version": "2.0.0",
  "description": "Firefox devtools extension for Odoo Owl framework",
  "manifest_version": 2,
  "browser_specific_settings": {
    "gecko": {
      "id": "@owl-devtools-firefox",
      "strict_min_version": "74.0"
    }
  },
  "icons": {
    "128": "assets/icon128.png"
  },
  "browser_action": {
    "default_icon": {
      "128": "assets/icon_disabled128.png"
    },
    "default_title": "Owl devtools",
    "default_popup": "popup_app/popup.html"
  },
  "web_accessible_resources": [
    "popup_app/popup.html",
    "devtools_app/devtools.html",
    "devtools_app/components_panel.html"
  ],
  "permissions": [
    "storage",
    "scripting",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "devtools_page": "devtools_app/devtools.html",
  "content_security_policy": "script-src 'self'; object-src 'self'",
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ]
    }
  ]
}