Examine source code of SimpleUI for LinkedIn

{
  "manifest_version": 3,
  "name": "SimpleUI for LinkedIn",
  "version": "1.9.2",
  "description": "Take control of your LinkedIn feed.",
  "permissions": [
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "simpleui-for-linkedin@simpleui.extension",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "action": {
    "default_title": "Options",
    "default_popup": "options.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "32": "icons/icon32.png"
    }
  },
  "options_page": "options.html",
  "content_scripts": [
    {
      "matches": [
        "https://www.linkedin.com/*"
      ],
      "js": [
        "localeMeta.js",
        "content.js"
      ],
      "run_at": "document_start"
    }
  ]
}