Examine source code of Simple URL Replacer

{
  "manifest_version": 2,
  "name": "Simple URL Replacer",
  "version": "1.0.2",
  "description": "Use right-click input or selected text to replace a token in a URL template and open a new tab.",
  "icons": {
    "16": "128.png",
    "32": "128.png",
    "48": "128.png",
    "128": "128.png"
  },
  "permissions": [
    "storage",
    "contextMenus",
    "tabs",
    "activeTab",
    "clipboardRead"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "selection-cache.js"
      ],
      "all_frames": true,
      "run_at": "document_idle"
    }
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "128.png",
      "32": "128.png",
      "48": "128.png",
      "128": "128.png"
    }
  },
  "commands": {
    "open-replaced-url-shortcut": {
      "suggested_key": {
        "default": "Alt+Shift+W",
        "mac": "MacCtrl+Shift+W"
      },
      "description": "Open replaced URL"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "simple-url-replacer@example.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  }
}