User-Agent - HTTP | MDN
La cadena del UA (user agent) de Firefox se divide en 4 componentes: Mozilla/5.0 es el token general que indica que el navegador es compatible con Mozilla. Por razones históricas, prácticamente todos …
What does the useragent "Mozilla/4.0 (compatible;)" mean?
Actually, all versions of Internet Exploder up to IE8 identify as Mozilla/4.0 (compatible), but there's usually more within the brackets, like Trident/OS version numbers.
Why do Chrome and IE put "Mozilla 5.0" in the User-Agent they send …
Feb 26, 2011 · Mozilla/5.0 is the general token that says the browser is Mozilla compatible, and is common to almost every browser today.
Mozilla/5.0 in User-Agent: Demystifying the String - 2coffee.dev
Apart from the unique strings that identify the browsers like Chrome/43.0.2357.65, Firefox/40.0, MSIE 9.0, almost all of them had a string called Mozilla/5.0 or sometimes WebKit.
History of the browser user-agent string - WebAIM
And Microsoft feared Firefox greatly, and Internet Explorer returned, and called itself Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.0) and it rendered good code, but only if webmasters …
Firefox user agent string reference - HTTP | MDN
Apr 13, 2026 · This document describes the user agent string used in Firefox 4 and later and applications based on Gecko 2.0 and later. For a breakdown of changes to the string in Gecko 2.0, …
What does " Mozilla/5.0" in user agent string signify?
I'm interested to know why Mozilla/5.0 is prefixed when I echo it in IE, Safari And Chrome? Honestly? Pretty much anything. :) See similar questions with these tags.