Don't move the page while I'm reading Continuity
Finding
Sometimes new content loads into a page and pushes the existing content down.
I'm reading something and suddenly the page moves because an image, ad, or other content loaded above it.
Now I have to find where I was again.
Idea
When new content loads, keep the user's current position stable.
For example, if I'm reading the 5th paragraph and an image loads above it, the page should adjust so that I'm still looking at the 5th paragraph.
The line you were reading, four paragraphs down.
reading here
image loads above · +176 px
scroll corrected · +176 px
the line you were reading · 0 px
Watching
Runs on its own
Why I like it
The user may never know why the page feels better.
They just don't lose their place.
When the interface changes, don't make the user lose their place.