For the latter, bills have been paid long ago (sunk costs), titles are carried in inventory at or close to zero cost, and direct mail campaigns will create a low cost of goods sold and will be able to sustain a lower rate of response.
A browser is software that is used to access the internet. A browser lets you visit websites and do activities within them like login, view multimedia, link from one site to another, visit one page from another, print, send and receive email, among many other activities.
The web's five most popular web browsers have support for web developer tools that allows web designers and developers to take a look at the make up of their pages. These are all tools that are built into the browser and do not require additional modules or configuration. Google Chrome â Web Developer Tools.