Examine source code of OMICall

{
  "name": "OMICall",
  "description": "Add VoIP call features to any websites",
  "version": "2.0.40",
  "manifest_version": 3,
  "permissions": [
    "storage",
    "scripting",
    "activeTab"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "action": {
    "default_popup": "/popup/index.html",
    "default_icon": {
      "16": "/assets/images/logo_16x16.png",
      "32": "/assets/images/logo_32x32.png",
      "48": "/assets/images/logo_48x48.png",
      "128": "/assets/images/logo_128x128.png"
    }
  },
  "options_page": "/setting/index.html",
  "icons": {
    "16": "/assets/images/logo_16x16.png",
    "32": "/assets/images/logo_32x32.png",
    "48": "/assets/images/logo_48x48.png",
    "128": "/assets/images/logo_128x128.png"
  },
  "content_scripts": [
    {
      "all_frames": true,
      "match_about_blank": false,
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "vhs@omicall",
      "strict_min_version": "126.0"
    }
  }
}