Examine source code of LinkedIn Full Width

{
  "manifest_version": 2,
  "name": "LinkedIn Full Width",
  "description": "Makes LinkedIn pages display in full width mode",
  "version": "1.2.0",
  "icons": {
    "16": "icons/16.png",
    "32": "icons/32.png",
    "48": "icons/48.png",
    "128": "icons/128.png"
  },
  "permissions": [
    "activeTab",
    "scripting",
    "storage",
    "webNavigation",
    "management",
    "https://www.linkedin.com/*"
  ],
  "web_accessible_resources": [
    "/inject-script.js"
  ],
  "content_security_policy": "script-src 'self' 'wasm-unsafe-eval'; object-src 'self';",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.linkedin.com/*"
      ],
      "all_frames": true,
      "run_at": "document_start",
      "js": [
        "content-scripts/content.js"
      ]
    }
  ],
  "browser_action": {
    "default_title": "LinkedIn Full Width"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{9679b3ab-2269-41f0-8097-7691dcf77850}"
    }
  }
}