Latest Amazon Fire 7 (2022) user agents:

User Agent	Browser	Platform
Mozilla/5.0 (Linux; Android 11; KFQUWI Build/RS8338.3339N; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/142.0.7444.236 Safari/537.36 [FB_IAB/FB4A;FBAV/548.1.0.51.64;IABMV/1;]	Facebook 548	Fire OS 8
Mozilla/5.0 (Linux; Android 11; KFQUWI) AppleWebKit/537.36 (KHTML, like Gecko) Silk/144.2.2 like Chrome/144.0.7559.177 Safari/537.36	Mobile Silk 144	Fire OS 8
Mozilla/5.0 (Linux; Android 11; KFQUWI) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/144.0.7559.246 Safari/537.36	Chrome 144	Fire OS 8
Mozilla/5.0 (Linux; Android 11; KFQUWI Build/RS8338.3339N; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/142.0.7444.236 Mobile 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; KFQUWI Build/RS8338.3339N; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/142.0.7444.236 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; KFQUWI Build/RS8338.3339N; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/142.0.7444.236 Safari/537.36 [FB_IAB/FB4A;FBAV/542.0.0.46.151;IABMV/1;]	Facebook 542	Fire OS 8
Mozilla/5.0 (Linux; Android 11; KFQUWI Build/RS8338.3339N; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/142.0.7444.236 Safari/537.36 [FB_IAB/FB4A;FBAV/547.0.0.41.68;IABMV/1;]	Facebook 547	Fire OS 8
Mozilla/5.0 (Linux; Android 11; KFQUWI) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/144.0.7559.228 Safari/537.36	Chrome 144	Fire OS 8
Mozilla/5.0 (Linux; Android 11; KFQUWI Build/RS8338.3339N; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/142.0.7444.236 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/548.1.0.51.64;IABMV/1;]	Facebook 548	Fire OS 8
Mozilla/5.0 (Linux; Android 11; KFQUWI Build/RS8338.3339N; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/142.0.7444.236 Safari/537.36 [FB_IAB/FB4A;FBAV/551.1.0.58.63;IABMV/1;]	Facebook 551	Fire OS 8
Mozilla/5.0 (Linux; Android 11; KFQUWI Build/RS8338.3339N; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/142.0.7444.236 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/551.1.0.58.63;IABMV/1;]	Facebook 551	Fire OS 8
Mozilla/5.0 (Linux; U; Android 11; en-; KFQUWI Build/RS8327.2526N) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.6478.186 Mobile Safari/537.36 PHX/15.3	Phoenix Browser 15	Fire OS 8
Mozilla/5.0 (Linux; Android 11; KFQUWI) AppleWebKit/537.36 (KHTML, like Gecko) Silk/130.1.70 like Chrome/130.0.6723.86 Safari/537.36	Mobile Silk 130	Fire OS 8
Mozilla/5.0 (Linux; Android 11; KFQUWI) AppleWebKit/537.36 (KHTML, like Gecko) Silk/128.4.2 like Chrome/128.0.6613.170 Safari/537.36	Mobile Silk 128	Fire OS 8
Mozilla/5.0 (Linux; Android 11; KFQUWI) AppleWebKit/537.36 (KHTML, like Gecko) Silk/128.2.1 like Chrome/128.0.6613.146 Safari/537.36	Mobile Silk 128	Fire OS 8
Mozilla/5.0 (Linux; Android 11; KFQUWI) AppleWebKit/537.36 (KHTML, like Gecko) Silk/126.5.1 like Chrome/126.0.6478.238 Safari/537.36	Mobile Silk 126	Fire OS 8
Mozilla/5.0 (Linux; Android 11; KFQUWI) AppleWebKit/537.36 (KHTML, like Gecko) Silk/126.4.6 like Chrome/126.0.6478.238 Safari/537.36	Mobile Silk 126	Fire OS 8
Mozilla/5.0 (Linux; Android 11; KFQUWI) AppleWebKit/537.36 (KHTML, like Gecko) Silk/126.3.3 like Chrome/126.0.6478.186 Safari/537.36	Mobile Silk 126	Fire OS 8
Mozilla/5.0 (Linux; Android 11; KFQUWI) AppleWebKit/537.36 (KHTML, like Gecko) Silk/124.5.1 like Chrome/124.0.6367.248 Safari/537.36	Mobile Silk 124	Fire OS 8
Mozilla/5.0 (Linux; Android 11; KFQUWI) AppleWebKit/537.36 (KHTML, like Gecko) Silk/124.3.2 like Chrome/124.0.6367.221 Safari/537.36	Mobile Silk 124	Fire OS 8