This is great! Pages usually jump up and down multiple times. I need one more thing. Prevent the same jump up/down behavior when using infinite scoll. E.g.

This is great! Pages usually jump up and down multiple times. I need one more thing. Prevent the same jump up/down behavior when using infinite scoll. E.g. if you use scoll bar to scroll down, new content apprearing changes the page height, making the scroll bar recalculate its position, and the whole thing jumps. Likewise, when I press the browser back button tp go back to the page with infinite scroll, it is only hard to find the point on that oage where I was.