Examine source code of Echo Radar

{
  "manifest_version": 3,
  "name": "Echo Radar",
  "version": "1.1.1",
  "description": "Salva post e profili LinkedIn in Echo Radar.",
  "host_permissions": [
    "https://*.linkedin.com/*",
    "https://echo.graffico.it/*"
  ],
  "permissions": [
    "storage",
    "tabs"
  ],
  "icons": {
    "16": "icon-16.png",
    "32": "icon-32.png",
    "128": "icon-128.png"
  },
  "action": {
    "default_popup": "popup.html",
    "default_title": "Echo Radar",
    "default_icon": {
      "16": "icon-16.png",
      "32": "icon-32.png"
    }
  },
  "background": {
    "scripts": [
      "background/index.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://*.linkedin.com/feed/"
      ],
      "js": [
        "content/feed.js"
      ],
      "run_at": "document_idle"
    },
    {
      "matches": [
        "https://*.linkedin.com/search/results/content/*",
        "https://*.linkedin.com/search/results/all/*"
      ],
      "js": [
        "content/search.js"
      ],
      "run_at": "document_idle"
    },
    {
      "matches": [
        "https://*.linkedin.com/in/*/recent-activity/*"
      ],
      "js": [
        "content/profile-activity.js"
      ],
      "run_at": "document_idle"
    },
    {
      "matches": [
        "https://*.linkedin.com/in/*"
      ],
      "exclude_matches": [
        "https://*.linkedin.com/in/*/recent-activity/*"
      ],
      "js": [
        "content/profile-capture.js"
      ],
      "run_at": "document_idle"
    },
    {
      "matches": [
        "https://*.linkedin.com/feed/hashtag/*"
      ],
      "js": [
        "content/hashtag.js"
      ],
      "run_at": "document_idle"
    },
    {
      "matches": [
        "https://echo.graffico.it/radar/extension*"
      ],
      "js": [
        "content/connect.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "echo-radar@graffico.it",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "authenticationInfo",
          "personallyIdentifyingInfo",
          "websiteActivity",
          "websiteContent"
        ]
      }
    }
  }
}