Frequently Asked Questions & Browser Guide
What is a web browser?
A web browser (commonly referred to as a browser) is application software for accessing the World Wide Web. When a user requests a web page from a particular website, the browser retrieves its files from a web server and then displays the page on the user's screen. Examples of popular modern browsers include Google Chrome, Apple Safari, Mozilla Firefox, Microsoft Edge, and Opera.
What is a User-Agent string?
The User-Agent is an HTTP request header that lets web servers identify the application, operating system, vendor, and version of the requesting agent. Web developers use this information to serve customized stylesheets, scripts, or fallbacks to ensure compatibility across diverse devices.
What is the difference between screen resolution and browser viewport?
Your physical screen resolution is the total number of hardware pixels on your display. The available screen resolution subtracts system interface elements such as taskbars and docks. The browser window viewport represents the inner area where web pages actually render, which varies based on your browser window size, sidebars, and bookmarks bar.
What is Device Pixel Ratio (DPR)?
Device Pixel Ratio (DPR) is the ratio between physical display pixels and logical CSS pixels. On high-density displays such as Apple Retina screens or 4K monitors, a DPR of 2.0 or 3.0 means that each logical CSS pixel is drawn using 4 or 9 physical pixels, resulting in much crisper typography and razor-sharp images.
How do we handle your privacy?
What Is My Browser does not store, log, or share your IP address, User-Agent, or system parameters. All diagnostics are evaluated transiently in memory to render the diagnostic view and are immediately discarded. No persistent cookies or tracking beacons are used.