Latest Mobile Silk 78 user agents:

User Agent Platform Device
Mozilla/5.0 (Linux; Android 9; KFMAWI) AppleWebKit/537.36 (KHTML, like Gecko) Silk/78.5.26 like Chrome/78.0.3904.108 Safari/537.36 Fire OS 7 Fire HD 10 (2019)
Mozilla/5.0 (Linux; Android 9; KFMAWI) AppleWebKit/537.36 (KHTML, like Gecko) Silk/78.4.6 like Chrome/78.0.3904.108 Safari/537.36 Fire OS 7 Fire HD 10 (2019)
Mozilla/5.0 (Linux; Android 9; KFGIWI) AppleWebKit/537.36 (KHTML, like Gecko) Silk/78.4.6 like Chrome/78.0.3904.108 Safari/537.36 Fire OS 7 Fire HD 8 (2016)
Mozilla/5.0 (Linux; Android 7.1.2; KFMUWI) AppleWebKit/537.36 (KHTML, like Gecko) Silk/78.5.26 like Chrome/78.0.3904.108 Safari/537.36 Fire OS 6 Fire 7" (2019)
Mozilla/5.0 (Linux; Android 7.1.2; KFMUWI) AppleWebKit/537.36 (KHTML, like Gecko) Silk/78.4.6 like Chrome/78.0.3904.108 Safari/537.36 Fire OS 6 Fire 7" (2019)
Mozilla/5.0 (Linux; Android 7.1.2; KFMUWI) AppleWebKit/537.36 (KHTML, like Gecko) Silk/78.2.1 like Chrome/78.0.3904.96 Safari/537.36 Fire OS 6 Fire 7" (2019)
Mozilla/5.0 (Linux; Android 7.1.2; KFKAWI) AppleWebKit/537.36 (KHTML, like Gecko) Silk/78.5.26 like Chrome/78.0.3904.108 Safari/537.36 Fire OS 6 Fire HD 8 (2018)
Mozilla/5.0 (Linux; Android 7.1.2; KFKAWI) AppleWebKit/537.36 (KHTML, like Gecko) Silk/78.4.6 like Chrome/78.0.3904.108 Safari/537.36 Fire OS 6 Fire HD 8 (2018)
Mozilla/5.0 (Linux; Android 7.1.2; KFKAWI) AppleWebKit/537.36 (KHTML, like Gecko) Silk/78.2.1 like Chrome/78.0.3904.96 Safari/537.36 Fire OS 6 Fire HD 8 (2018)
Mozilla/5.0 (Linux; Android 7.1.2; AFTMM) AppleWebKit/537.36 (KHTML, like Gecko) Silk/78.3.19 like Chrome/78.0.3904.108 Safari/537.36 Fire OS 6 Nebula Soundbar
Mozilla/5.0 (Linux; Android 5.1.1; KFTBWI) AppleWebKit/537.36 (KHTML, like Gecko) Silk/78.5.26 like Chrome/78.0.3904.108 Safari/537.36 Fire OS 5 Fire HD 10
Mozilla/5.0 (Linux; Android 5.1.1; KFTBWI) AppleWebKit/537.36 (KHTML, like Gecko) Silk/78.4.6 like Chrome/78.0.3904.108 Safari/537.36 Fire OS 5 Fire HD 10
Mozilla/5.0 (Linux; Android 5.1.1; KFTBWI) AppleWebKit/537.36 (KHTML, like Gecko) Silk/78.2.1 like Chrome/78.0.3904.96 Safari/537.36 Fire OS 5 Fire HD 10
Mozilla/5.0 (Linux; Android 5.1.1; KFSUWI) AppleWebKit/537.36 (KHTML, like Gecko) Silk/78.5.26 like Chrome/78.0.3904.108 Safari/537.36 Fire OS 5 Fire HD 10 (2017)
Mozilla/5.0 (Linux; Android 5.1.1; KFSUWI) AppleWebKit/537.36 (KHTML, like Gecko) Silk/78.4.6 like Chrome/78.0.3904.108 Safari/537.36 Fire OS 5 Fire HD 10 (2017)
Mozilla/5.0 (Linux; Android 5.1.1; KFSUWI) AppleWebKit/537.36 (KHTML, like Gecko) Silk/78.2.1 like Chrome/78.0.3904.96 Safari/537.36 Fire OS 5 Fire HD 10 (2017)
Mozilla/5.0 (Linux; Android 5.1.1; KFMEWI) AppleWebKit/537.36 (KHTML, like Gecko) Silk/78.5.26 like Chrome/78.0.3904.108 Safari/537.36 Fire OS 5 Fire HD 8 (2015)
Mozilla/5.0 (Linux; Android 5.1.1; KFMEWI) AppleWebKit/537.36 (KHTML, like Gecko) Silk/78.4.6 like Chrome/78.0.3904.108 Safari/537.36 Fire OS 5 Fire HD 8 (2015)
Mozilla/5.0 (Linux; Android 5.1.1; KFMEWI) AppleWebKit/537.36 (KHTML, like Gecko) Silk/78.2.1 like Chrome/78.0.3904.96 Safari/537.36 Fire OS 5 Fire HD 8 (2015)
Mozilla/5.0 (Linux; Android 5.1.1; KFMEWI) AppleWebKit/537.36 (KHTML, like Gecko) Silk/78.1.184 like Chrome/78.0.3904.90 Safari/537.36 Fire OS 5 Fire HD 8 (2015)