Goodreads Shelf Position Editor by Evan Wondrasek

Goodreads lets you order your To Read shelf by position, but editing a book's position requires navigating to the To Read shelf page, and the shelf's search view doesn't display the position column at all, which is a huge problem if you have a large To Read list. This add-on lets you see, and set, the book's position in your To Read shelf directly on each book's detail page, where it's most useful.

With Goodreads Shelf Position Editor installed, any Goodreads book page includes a small widget appears near the shelf buttons:
- If the book is on your To Read shelf: shows an editable position field with Save and Refresh controls
- If the book is not on your shelf: shows a short notice instead

Edit the number, press Enter or click Save, and the position updates immediately.