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Amazon Kindle’s HTTP User-Agent string

I couldn’t find anyone else documenting this, so I figured someone else might someday benefit from knowing this.

As of today, this is the HTTP User-Agent string sent by the first (and so far, only) version of the Amazon Kindle.

Mozilla/4.0 (compatible; Linux 2.6.10) NetFront/3.3 Kindle/1.0 (screen 600x800)

It’s probably safe to detect it with a simple substring match: Kindle/

And while the usage numbers aren’t there yet to justify a ton of effort, Kindle readers can strongly benefit from a few layout tweaks and optimizations.

Be careful of caching potential: as far as I can tell, Amazon is proxying the content.