Question 1

Why do modern browsers display a fixed OS version like 10_15_7?

Accepted Answer

Modern browsers simplify default User-Agent strings to protect visitor privacy and reduce passive device tracking across websites.

Question 2

Does a crawler or bot name in the identifier prove its identity?

Accepted Answer

No. Because any program can customize its User-Agent text, website owners verify official search crawlers using DNS and IP ownership records.

Question 3

How does checking device and browser share help website planning?

Accepted Answer

Knowing the balance between mobile and desktop visitors helps prioritize responsive layouts, font legibility, and image optimization.

Browser & Device Details | Everyday web tasks, made easier. — Fantatree — Understand what a browser identifier reveals about your browser version, rendering engine, operating system, device type, and general web traffic trends.