More like the chapters themselves will stay in, just the images from those chapters won't be included so they'll end up with the empty boxes there.
The chapters will still be playable, they just won't have pictures when playing in the browser.
That will go for ALL of the chapter content, so for example, every scene in Chapter 2 and 3 will have missing images in the browser version, but chapters 1, 4, and 5 will still have them.
Then when I start on chapter 6, chapter 3 will lose the images so 6 can have them.