Project name and homepage: FireBug
Link to bug
Problem description
Subtab HTML/Layout displays graphical layout of HTML element selected in the browser; its CSS attributes padding, margin and position are shown. Then, there is more information added, some important CSS attributes, position, box-sizing and z-index. The goal is to add new attribute display so that user know the way the position attributes are interpreted.
Repository
https://github.com/firebug/firebug/pull/141