Better base layout:
- Pin pages to a Y coordinate toward the top of the graph.
- Optionally stagger pages towards the top.
- Distribute pages in the X, by biasing or pinning them on an X coordinate.
- Likewise pin processes to a Y coordinate towards the bottom of the graph.
- Bias frames towards a y-coordinate proportional to their level in the frame tree.

Better transitions:
- Initialize nodes to a location proximate to their graph neighbors.

Better data visualization:
- Label page nodes with the page title.
- Label frame nodes with their URL.
- Size process nodes proportionally to their memory size.
- Color process nodes proportionally to their CPU usage.
- Size page and frame nodes proportionally to their estimated memory size.
- Allow presentation of lifecycle state or other interesting attributes by frame or page.
- Allow presentation of current priorities.

Add a selection mode:

- clicking on a node highlights all nodes and edges related to it in a meaningful way?

Better data visualization:
- Propagate the set of hosted sites down to process nodes.
- Provide some kind of a detail view for a selected node.

It would be useful to allow "pinning" frame nodes, such that they don't move around when the graph changes around them. This makes it easier to observe how a particular part of the graph changes during navigation or such.