Browser anatomy

The different parts of the browser

Anatomy

The desktop browser layout is broken up into a few areas.

The UI that frames the web content is "the chrome" (tab strip, toolbar, bookmarks, infobar, sidebar, find bar, etc.); Anything found within the web content (viewport) is referred to as "in-content."; And lastly, the line separating these is called the "Line of Trust".

Firefox for macOS

Firefox for macOS

Key

Description

 

1

The chrome

The collective term for the UI elements that frame web content, including toolbars, sidebars, and the tab strip.

2

In-content

The area of the browser where web content appears.

3

Line of Trust

The line separating the chrome from in-content material, which helps identify trustworthy content that comes from the browser (web content cannot cross into the chrome). See Line of Trust