> but they had to change the "chrome" namespace to "browser"

It's weird, because Firefox internally has had the "chrome" namespace long before Google Chrome existed.

In browser terminology the browser "chrome" is the stuff that's outside the browser engine -- the stuff that doesn't handle loading/laying out/rendering/javascripting a page. I.e. the tab strip, URL bar, bookmarks, context menus, settings, etc.

IIRC (very unsure of this, but have heard it from different non-google sources) the name "Google Chrome" is actually a joke on this because it had the least chrome amongst browsers of the time (remember the toolbar and status bar?)