Usage share of web browsers

How it is measured

Measurements of usage share rely on data-gathering methods that can produce different results. Common approaches include analyzing pageviews or unique visitors collected by web analytics services, browser telemetry from installed software, and sampling from panels of sites. Each method has trade-offs: pageview counts weight heavy users more, user-based counts aim to equalize individuals, and telemetry can be biased toward those who opt into reporting.

• Typical data sources: analytics logs, telemetry, and industry surveys (sample sites).
• What is counted: the user agent string or other identifiers to determine the browser.
• Reporting choices: desktop vs mobile, worldwide vs regional, and whether related engines are grouped.

Historical trends and causes

Over the past two decades the dominant browser brands have changed several times. A decade or more ago, Internet Explorer held a very large share; later, competition from Mozilla Firefox and then Google Chrome shifted the balance. Chrome has often been the largest single browser by usage; for example, some reports showed it near two-thirds of visits in certain periods (for instance, around 64% in May 2022). Mobile browsing has also reshaped shares because browsers integrated into mobile platforms, and WebKit/Blink engine forks have influenced compatibility and development.

Factors that influence usage share

Usage share varies by many factors, including geography, device type (desktop, tablet, phone), demographics, and the selection of websites sampled. Enterprise environments may retain older browsers for compatibility, while consumer audiences often adopt newer browsers faster. Security reputation, default browser settings on popular devices, preinstallation by manufacturers, and performance perceptions all affect long-term trends.

Importance and implications

Understanding browser usage share is important for web developers, security teams, and product managers. Developers use share data to prioritize testing and to decide which features need polyfills or fallbacks. Security professionals watch shifts because abandoned or legacy browsers can pose risks; for instance, older releases of Internet Explorer declined in share partly as organizations migrated away due to security and compatibility concerns. Policymakers and businesses may use share estimates to plan support lifecycles and compatibility strategies.

Distinctions and notable facts

Usage share differs from other metrics like browser vendor market capitalization or installation base. Reports can diverge because of methodological choices, so it is best to consult multiple sources and to inspect whether a report covers global traffic, only desktop, only mobile, or a particular subset of sites. For further reading on methodology and a range of published figures, see industry analytics and research pages such as browser classification and tracker summaries like browser reports and vendor notes (site panels).