Examine source code of Highlight + Censor

{
  "manifest_version": 3,
  "name": "Highlight + Censor",
  "version": "1.0.0",
  "description": "Straightforward: Highlight + Censor. Use it as guides or to hide details.",
  "permissions": [
    "contextMenus",
    "activeTab",
    "scripting",
    "tabs"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "scripts/content.js"
      ],
      "css": [
        "css/highlight-censor-styles.css"
      ],
      "run_at": "document_end"
    }
  ],
  "icons": {
    "16": "images/icon-16.png",
    "32": "images/icon-32.png",
    "48": "images/icon-48.png",
    "96": "images/icon-96.png",
    "128": "images/icon-128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "@highlight-censor.perf.as.fck",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}