pgnFromChess24

Steps to download pgn file from chess24.com

go to a chess game on chess24.com (e.g. Ivanchuk, Vasyl - Van Foreest, Jorden)
open browser's console
paste code from main.js and press enter

alternatively you can also create bookmarklet (Chrome)

right click on bookmark panel
click Add Page button
name bookmarklet (e.g. downloadGameChess24)
paste code from bookmarklet.js in the URL field