Latest Amazon Fire HD 10 (2023) user agents:

User Agent	Browser	Platform
Mozilla/5.0 (Linux; Android 11; KFTUWI) AppleWebKit/537.36 (KHTML, like Gecko) Silk/148.2.1 like Chrome/148.0.7778.178 Safari/537.36	Mobile Silk 148	Fire OS 8
Mozilla/5.0 (Linux; Android 11; KFTUWI Build/RS8338.3339N; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/146.0.7680.165 Safari/537.36	Chrome Webview 146	Fire OS 8
Mozilla/5.0 (Linux; Android 11; KFTUWI Build/RS8338.3339N) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/146.0.7680.165 Safari/537.36 [FB_IAB/FB4A;FBAV/562.0.0.51.73;IABMV/1;]	Facebook 562	Fire OS 8
Mozilla/5.0 (Linux; Android 11; KFTUWI Build/RS8338.3339N; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/146.0.7680.165 Mobile Safari/537.36 [Pinterest/Android]	Pinterest	Fire OS 8
Mozilla/5.0 (Linux; Android 11; KFTUWI) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/146.0.7680.224 Safari/537.36	Chrome 146	Fire OS 8
Mozilla/5.0 (Linux; Android 11; KFTUWI Build/RS8338.3339N; ) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/146.0.7680.165 Safari/537.36 musical_ly_2024202030 JsSdk/1.0 NetType/WIFI Channel/amazon_int AppName/musical_ly app_version/42.2.3 ByteLocale/en ByteFullLocale/en Region/ AppId/1233 Spark/1.7.2 AppVersion/42.2.3 PIA/2.5.3 BytedanceWebview/d8a21c6	TikTok 42	Fire OS 8
Mozilla/5.0 (Linux; Android 11; KFTUWI) AppleWebKit/537.36 (KHTML, like Gecko) Silk/146.4.10 like Chrome/146.0.7680.224 Safari/537.36	Mobile Silk 146	Fire OS 8
Mozilla/5.0 (Linux; Android 11; KFTUWI Build/RS8338.3339N) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/146.0.7680.165 Safari/537.36 [FB_IAB/FB4A;FBAV/559.1.0.52.72;IABMV/1;]	Facebook 559	Fire OS 8
Mozilla/5.0 (Linux; Android 11; KFTUWI Build/RS8338.3339N) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/146.0.7680.165 Safari/537.36 [FB_IAB/FB4A;FBAV/560.0.0.57.63;IABMV/1;]	Facebook 560	Fire OS 8
Mozilla/5.0 (Linux; Android 11; KFTUWI) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/146.0.7680.199 Safari/537.36	Chrome 146	Fire OS 8
Mozilla/5.0 (Linux; Android 11; KFTUWI) AppleWebKit/537.36 (KHTML, like Gecko) Silk/146.3.7 like Chrome/146.0.7680.199 Safari/537.36	Mobile Silk 146	Fire OS 8
Mozilla/5.0 (Linux; Android 11; KFTUWI Build/RS8338.3339N; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/144.0.7559.237 Safari/537.36 [FB_IAB/FB4A;FBAV/556.0.0.60.64;IABMV/1;]	Facebook 556	Fire OS 8
Mozilla/5.0 (Linux; Android 11; KFTUWI Build/RS8338.3339N) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/144.0.7559.237 Safari/537.36 [FB_IAB/FB4A;FBAV/555.0.0.49.59;IABMV/1;]	Facebook 555	Fire OS 8
Mozilla/5.0 (Linux; Android 11; KFTUWI Build/RS8338.3339N; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/144.0.7559.237 Safari/537.36 [FB_IAB/FB4A;FBAV/555.0.0.49.59;IABMV/1;]	Facebook 555	Fire OS 8
Mozilla/5.0 (Linux; Android 11; KFTUWI Build/RS8338.3339N; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/144.0.7559.237 Safari/537.36 [FB_IAB/FB4A;FBAV/552.1.0.45.68;IABMV/1;]	Facebook 552	Fire OS 8
Mozilla/5.0 (Linux; Android 11; KFTUWI Build/RS8338.3339N; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/144.0.7559.237 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/555.0.0.49.59;IABMV/1;]	Facebook 555	Fire OS 8
Mozilla/5.0 (Linux; Android 11; KFTUWI) AppleWebKit/537.36 (KHTML, like Gecko) Silk/146.2.1 like Chrome/146.0.7680.165 Safari/537.36	Mobile Silk 146	Fire OS 8
Mozilla/5.0 (Linux; Android 11; KFTUWI Build/RS8338.3339N; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/144.0.7559.237 Safari/537.36 [Pinterest/Android]	Pinterest	Fire OS 8
Mozilla/5.0 (Linux; Android 11; KFTUWI Build/RS8338.3339N; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/144.0.7559.237 Safari/537.36[FBAN/EMA;FBLC/en_US;FBAV/476.0.0.14.109;FBCX/modulariab;]	Facebook Lite 476	Fire OS 8
[FBAN/FB4A;FBAV/555.0.0.49.59;FBBV/926292908;FBDM/{density=1.5,width=1200,height=1848};FBLC/en_US;FBRV/932061721;FBCR/;FBMF/Amazon;FBBD/Amazon;FBPN/com.facebook.katana;FBDV/KFTUWI;FBSV/11;FBOP/1;FBCA/armeabi-v7a:armeabi;]	Facebook 555	Android 11