Latest Fire OS 7 user agents:

User Agent Browser Device
Mozilla/5.0 (Linux; Andr0id 9; AFTSHNHD-03) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/141.0.7390.108 Safari/537.36 OMI/4.26.2.309.AFTdev.1009 HbbTV/1.6.1 ( DRM;Amazon;AFTSHNHD-03-THOMSON-32HF2S34;0034763741316;unknown;com.amazon.shine;) smarttv_AFTSHNHD-03-THOMSON-32HF2S34_Build_0034763741316_Chromium_141.0.7390.108 LaTivu_2.1.0_2025 Opera Devices 4 Unknown
Mozilla/5.0 (Linux; Android 9; KFMAWI Build/PS7321; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/92.0.4515.115 Safari/537.36 [FB_IAB/FB4A;FBAV/554.0.0.57.70;] Facebook 554 Fire HD 10 (2019)
Mozilla/5.0 (Linux; Android 9; KFMUWI Build/PS7331.4463N; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/138.0.7204.244 Safari/537.36 [FB_IAB/FB4A;FBAV/495.0.0.45.201;] Facebook 495 Fire 7" (2019)
Mozilla/5.0 (Linux; Android 9; KFMUWI) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/81.0.4044.138 Safari/537.36 Chrome 81 Fire 7" (2019)
Mozilla/5.0 (Linux; Android 9; KFKAWI Build/PS7331.4463N; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/138.0.7204.244 Safari/537.36 [FB_IAB/FB4A;FBAV/555.0.0.49.59;IABMV/1;] Facebook 555 Fire HD 8 (2018)
Mozilla/5.0 (Linux; Android 9; KFTRWI Build/PS7331.4463N; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/138.0.7204.244 Safari/537.36 [FB_IAB/FB4A;FBAV/522.0.0.52.96;IABMV/1;] Facebook 522 Fire HD 10 (2021)
Mozilla/5.0 (Linux; Android 9; AFTHA002 Build/PS7712.5370N; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/138.0.7204.244 Mobile Safari/537.36 Chrome Webview 138 V35 Series (2021)
Mozilla/5.0 (Linux; Android 9; KFTRWI Build/PS7331.4463N) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/138.0.7204.244 Safari/537.36 [FB_IAB/FB4A;FBAV/555.0.0.49.59;IABMV/1;] Facebook 555 Fire HD 10 (2021)
Mozilla/5.0 (Linux; Android 9; KFTRWI Build/PS7331.4463N; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/146.0.7680.174 Safari/537.36 [FB_IAB/FB4A;FBAV/555.0.0.49.59;IABMV/1;] Facebook 555 Fire HD 10 (2021)
Mozilla/5.0 (Linux; Android 9; AFTCA002 Build/PMAIN1.311N; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/138.0.7204.244 Mobile Safari/537.36 Chrome Webview 138 Unknown
Mozilla/5.0 (Linux; Android 9; KFTRWI Build/PS7331.4463N; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/138.0.7204.244 Safari/537.36 [FB_IAB/FB4A;FBAV/494.0.0.55.73;] Facebook 494 Fire HD 10 (2021)
Mozilla/5.0 (Linux; Android 9; AFTHA003 Build/PS7712.5370N; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/138.0.7204.244 Mobile Safari/537.36 Chrome Webview 138 Fire TV 4K (2021)
Mozilla/5.0 (Linux; Android 9; KFTRPWI Build/PS7331.4463N; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/138.0.7204.244 Safari/537.36 [FB_IAB/FB4A;FBAV/555.0.0.49.59;IABMV/1;] Facebook 555 Fire HD 10 Plus (2021)
Mozilla/5.0 (Linux; Android 9; KFTRWI Build/PS7331.4463N; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/138.0.7204.244 Safari/537.36 [FB_IAB/FB4A;FBAV/555.0.0.49.59;IABMV/1;] Facebook 555 Fire HD 10 (2021)
Mozilla/5.0 (Linux; Android 9; KFMAWI Build/PS7331.4463N; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/120.0.6099.266 Safari/537.36 [FB_IAB/FB4A;FBAV/555.0.0.49.59;] Facebook 555 Fire HD 10 (2019)
Mozilla/5.0 (Linux; Android 9; KFONWI Build/PS7331.4463N; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/138.0.7204.244 Safari/537.36 [FB_IAB/FB4A;FBAV/555.0.0.49.59;IABMV/1;] Facebook 555 Fire HD 8 (2020)
Mozilla/5.0 (Linux; Android 9; KFMAWI Build/PS7331.4463N; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/138.0.7204.244 Safari/537.36 [FB_IAB/FB4A;FBAV/555.0.0.49.59;IABMV/1;] Facebook 555 Fire HD 10 (2019)
Hulu/1.178.0 (Fire OS 7.7.1.2 (PS7712/5370); ; AFTSSS; Build/Neutron - 1.4.596) Hulu 1 Fire TV Stick (Gen 3)
Mozilla/5.0 (Linux; Android 9; KFTRWI Build/PS7331.4463N; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/138.0.7204.244 Safari/537.36 [FB_IAB/FB4A;FBAV/554.0.0.57.70;IABMV/1;] Facebook 554 Fire HD 10 (2021)
Hulu/1.178.0 (Fire OS 7.7.1.2 (PS7712/5370); ; AFTSS; Build/Neutron - 1.4.596) Hulu 1 Fire TV Stick Lite (Gen 1)