The usage share of web browsers is the portion, often expressed as a percentage, of visitors to a group of web sites that use a particular web browser.

This is a comparison of both historical and current web browsers based on developer, engine, platform(s), releases, license, and cost.

This is a timeline of web browsers from 1990 to the present.

A lightweight web browser is a web browser that sacrifices some of the features of a mainstream web browser in order to reduce the consumption of system resources, and especially to minimize the memory footprint.