Examine source code of Proper Links

{
  "manifest_version": 3,
  "name": "Proper Links",
  "version": "1.1.1",
  "description": "For those tired of hunting for links on a page and fed up with unpredictable link behavior.",
  "permissions": [
    "storage",
    "activeTab"
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "icons/*.svg"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "icons": {
    "32": "icons/main-icon.svg",
    "48": "icons/main-icon.svg",
    "96": "icons/main-icon.svg",
    "128": "icons/main-icon.svg"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{0a08576f-4abd-40f8-9a55-a9d32a92c5d7}",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_popup": "popup.html",
    "default_title": "Proper Links",
    "default_icon": "icons/main-icon.svg"
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "css": [
        "styles.css"
      ],
      "js": [
        "content.js"
      ]
    }
  ]
}