Generally speaking I prefer to write Google Forms outside of the browser, usually in Evernote. The writing is stored automatically and is availble across devices. I also find that I concentrate better outside of the form. Sometimes the questions require some real chin scratching and I find that the Google Forms interface lends itself to rush. I just want to take it nice and slow like Usher.
Bookmarklet to rescue the questions from the Google Form
Drag this bad boy to the bookmarks toolbar: Extract Qs. Give it a click when you’re on the form page. Source here.
The unsuspecting form beforehand: