Examine source code of Yank-clipboard

{
  "manifest_version": 2,
  "name": "Yank",
  "version": "0.1.0",
  "description": "Smart clipboard extension with URL copy, auto-copy, and JSON Tools transforms.",
  "browser_specific_settings": {
    "gecko": {
      "id": "@yank.reklai",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "tabs",
    "activeTab",
    "storage",
    "clipboardRead",
    "clipboardWrite",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "contentScript.js"
      ],
      "match_about_blank": true,
      "run_at": "document_idle"
    }
  ],
  "commands": {
    "copy-page-url": {
      "description": "Copy current page URL"
    }
  },
  "options_ui": {
    "page": "optionsPage/optionsPage.html",
    "open_in_tab": true
  },
  "browser_action": {
    "default_icon": {
      "48": "icons/icon-48.png",
      "96": "icons/icon-96.png"
    },
    "default_popup": "toolbarPopup/toolbarPopup.html",
    "default_title": "Yank"
  },
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png",
    "128": "icons/icon-128.png"
  }
}