A long time ago I did that to make Canonical's Launchpad easier to read - mostly making tables look nicer and so on. I was really nice. I saw similar initiative

A long time ago I did that to make Canonical's Launchpad easier to read - mostly making tables look nicer and so on. I was really nice. I saw similar initiatives at Workday as well - browser plugins that added extra functionality to the development instances of the application.