I am using Chrome in linux with Version 51.0.2704.63 (64-bit). I recorded a HTTP request of Chrome and here is part of the recording: User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2704.63 Safari/537.36 Why does Chrome send four browsers in the user-agent field? Is this a countermeasure to obfuscate the browser version?
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Log in to answerBest Answer · By JanBask Cyber Security Expert
Answered on Mar 29, 2022
Presumably you mean the following four:
Mozilla/5.0 (X11; Linux x86_64)
AppleWebKit/537.36 (KHTML, like Gecko)
Chrome/51.0.2704.63
Safari/537.36
most Web browsers use a User-Agent string value as follows:
Mozilla/[version] ([system and browser information]) [platform] ([platform details]) [extensions].
Mozilla is a byproduct of browser wars.
AppleWebKit/537.36 is the platform used by your browser.
Chrome/51.0.2704.63 is your browserSafari/537.36 was added for historic reasons, where Safari was treated differently. You may wish to also read this history.
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