The browser that spearheaded the popularity of the Web was Netscape Navigator 3.0,which was released around 1996. The code name of the Netscape engine was Mozilla, and the user-agent string had a very simple format:
Mozilla/AppVersion (Platform; Security [; OS-or-CPU-Description])
In order to fully understand exactly what is going on, take a look at an example from Netscape 6.2.1 running on Windows XP:
Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:0.9.4) Gecko/20011128
Netscape6/6.2.1
Matching up the various pieces of information:
❑ MozillaVersion is 5.0.
❑ Platform is Windows.
❑ Security is U.
❑ OS-or-CPU is Windows NT 5.1
❑ Localization information is en-US.
❑ PrereleaseVersion is rv:0.9.4.
❑ GeckoVersion is 20011128.
❑ ApplicationProduct is Netscape 6
❑ ApplicationProductVersion is 6.2.1.
The following table displays some common browsers and their user-agent strings
Browser
|
User-Agent String |
| Internet Explorer 6.0 |
Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)
(Windows XP) |
| Mozilla 1.5 |
Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.5)
(Windows XP) Gecko/20031007 |
| Firefox 0.92 |
Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7)
(Windows XP) Gecko/20040707 Firefox/0.8 |
| Opera 7.54 |
Opera/7.54 (Windows NT 5.1; U)
(Windows XP) |
| Safari 1.25 |
Mozilla/5.0 (Macintosh; U; PPC Mac OS X; en)
(MacOS X) Apple-WebKit/124 (KHTML, like Gecko) Safari/125.1 |
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