In Chrome, the Luminate Online Page Editor extension adds a pencil icon to the address bar. The icon is only displayed when viewing a Luminate Online page.
The Chrome extension includes luminateEdit.js and luminateEdit-chrome.js, compiled in background.js.
The extension can be downloaded from the Chrome Web Store at https://chrome.google.com/webstore/detail/luminate-online-page-edit/dpkklfhgpnjklakhoelfnbfgihkfgpap.