Attention
This extension has been marked as obsolete. With TYPO3 v12.0 this feature was added to the admin panel directly. So there is no need for a v12 compatible version of this extension: Feature: #97326 - Open backend page from admin panel.
Introduction
What does it do?
The extension provides a button in the TYPO3 Admin Panel to jump directly from the frontend page to the corresponding backend form. This eliminates the need to click through the page tree to edit a page.
The user's access rights are taken into account - so if they do not have permission to edit a page, the Edit section is not available.
Screenshots

Admin Panel with the "Edit page in backend" button
Credits
Special thanks go to the maintainers of the Frontend editing extension (feedit) where this function was taken from.