Browsers give away device name through user agent - Et tu Browser!

My mobile browser has been letting the websites I visit know what handset I use and I wouldn't have known this until I saw this targeted ad - an ad for case for Lumia 530

I knew about browser user-agent strings, but today I learnt that browsers give away device model name as well, through the user agent they expose -
Mozilla/5.0 (Windows Phone 8.1; ARM; Trident/7.0; Touch; rv:11.0; IEMobile/11.0; NOKIA; Lumia 530 Dual SIM) like Gecko

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