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What are the characters "/vkobks/" in this user agent string for: mozilla/5.0 (windows nt 3.1; rv:26.0) /vkobks/ gecko/3151415 firefox/26.14

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  • Last reply by James

fsalvadore21
fsalvadore21
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Our Web Application monitoring system is identifying unique user agent strings that contain different characters. We don't recall seeing these before and was hoping we could get an explanation. Here are some examples:

mozilla/5.0 (windows nt 3.1; rv:26.0) /vkobks/ gecko/3151415 firefox/26.14 mozilla/5.0 (windows nt 3.1; rv:26.0) /3lfgqt/ gecko/1081869 firefox/32.15 mozilla/5.0 (windows nt 3.1; rv:26.0) /b6am7x/ gecko/8611279 firefox/35.11

Our Web Application monitoring system is identifying unique user agent strings that contain different characters. We don't recall seeing these before and was hoping we could get an explanation. Here are some examples: mozilla/5.0 (windows nt 3.1; rv:26.0) /vkobks/ gecko/3151415 firefox/26.14 mozilla/5.0 (windows nt 3.1; rv:26.0) /3lfgqt/ gecko/1081869 firefox/32.15 mozilla/5.0 (windows nt 3.1; rv:26.0) /b6am7x/ gecko/8611279 firefox/35.11

All Replies (2)

TyDraniu
TyDraniu
  • Top 10 Contributor
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Hi.

Different addons are able to set the unique user agents every 5 minutes. But it doesn't have to be Firefox after all.

James
James
  • Top 25 Contributor
  • Moderator
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Too me they could just be random useragents.

NT 3.1 is a Windows from 1993 and the Firefox versions 26.14, 32.15, 35.11 never existed as you can see on https://www.mozilla.org/firefox/releases/