Examine source code of Linkedin Feed Remover

{
  "manifest_version": 3,
  "name": "Feed Remover",
  "version": "1.3",
  "description": "Replace your LinkedIn Feed with a cute cat.",
  "icons": {
    "48": "icons/icon.png"
  },
  "action": {
    "default_title": "Feed Remover",
    "default_popup": "popup/popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.linkedin.com/*"
      ],
      "js": [
        "content_scripts/images.js",
        "content_scripts/messages.js",
        "content_scripts/main.js"
      ]
    }
  ],
  "background": {
    "service_worker": "service_worker/background.js",
    "scripts": [
      "service_worker/background.js"
    ]
  },
  "web_accessible_resources": [
    {
      "resources": [
        "images/cats/*",
        "images/dogs/*"
      ],
      "matches": [
        "*://*.linkedin.com/*"
      ]
    }
  ],
  "permissions": [
    "activeTab",
    "storage"
  ],
  "commands": {
    "toggle-feature": {
      "suggested_key": {
        "default": "Ctrl+Shift+Y",
        "linux": "Ctrl+Shift+U"
      },
      "description": "Show/hide feed."
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{8e1eac52-5ce1-4833-81dd-41e622595e0d}",
      "strict_min_version": "115.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}