Latest Safari 8 user agents:

User Agent Platform Device
Mozilla/5.0 (Linux; x86_64 GNU/Linux) AppleWebKit/601.1 (KHTML, like Gecko) Version/8.0 Safari/601.1 WPE ComcastAppPlatform E550AE43C Firebolt/0.8.1 1.0.0.0 Xfinity GNU/Linux Unknown
Mozilla/5.0 (Linux; x86_64 GNU/Linux) AppleWebKit/601.1 (KHTML, like Gecko) Version/8.0 Safari/601.1 WPE ComcastAppPlatform E550AE50C Firebolt/0.8.1 GNU/Linux Unknown
Mozilla/5.0 (Linux; x86_64 GNU/Linux) AppleWebKit/601.1 (KHTML, like Gecko) Version/8.0 Safari/601.1 WPE ComcastAppPlatform 43A6GX Firebolt/0.8.1 GNU/Linux Unknown
Mozilla/5.0 (Linux; x86_64 GNU/Linux) AppleWebKit/601.1 (KHTML, like Gecko) Version/8.0 Safari/601.1 WPE ComcastAppPlatform COESST11AEI Firebolt/1.5.0 GNU/Linux Unknown
Mozilla/5.0 (Linux; x86_64 GNU/Linux) AppleWebKit/601.1 (KHTML, like Gecko) Version/8.0 Safari/601.1 WPE 1.0.0.0 Xfinity PERF3 partnerId:comcast GNU/Linux Unknown
Mozilla/5.0 (Linux; x86_64 GNU/Linux) AppleWebKit/601.1 (KHTML, like Gecko) Version/8.0 Safari/601.1 WPE ComcastAppPlatform PN24-551-24U Firebolt/0.8.1 GNU/Linux Unknown
Mozilla/5.0 (Linux; x86_64 GNU/Linux) AppleWebKit/601.1 (KHTML, like Gecko) Version/8.0 Safari/601.1 WPE ComcastAppPlatform E550AE50C-G Firebolt/0.8.1 GNU/Linux Unknown
Mozilla/5.0 (Linux; x86_64 GNU/Linux) AppleWebKit/601.1 (KHTML, like Gecko) Version/8.0 Safari/601.1 WPE ComcastAppPlatform WX24HX2800 Firebolt/0.8.1 GNU/Linux Unknown
Mozilla/5.0 (Linux; x86_64 GNU/Linux) AppleWebKit/601.1 (KHTML, like Gecko) Version/8.0 Safari/601.1 WPE, xglobalSTB/1.0.0.0 (PERF3) GNU/Linux Unknown
Mozilla/5.0 (Linux; x86_64 GNU/Linux) AppleWebKit/601.1 (KHTML, like Gecko) Version/8.0 Safari/601.1 WPE ComcastAppPlatform COESST11AEI Firebolt/1.7.0 GNU/Linux Unknown
Mozilla/5.0 (Linux; x86_64 GNU/Linux) AppleWebKit/601.1 (KHTML, like Gecko) Version/8.0 Safari/601.1 WPE ComcastAppPlatform E550AE65C-G Firebolt/0.8.1 GNU/Linux Unknown
Mozilla/5.0 (Linux; x86_64 GNU/Linux) AppleWebKit/601.1 (KHTML, like Gecko) Version/8.0 Safari/601.1 WPE ComcastAppPlatform E550AE65C Firebolt/0.8.1 GNU/Linux Unknown
Mozilla/5.0 (Linux; x86_64 GNU/Linux) AppleWebKit/601.1 (KHTML, like Gecko) Version/8.0 Safari/601.1 WPE ComcastAppPlatform SCXI11AIC Firebolt/0.8.1 GNU/Linux Unknown
Mozilla/5.0 (Linux; x86_64 GNU/Linux) AppleWebKit/601.1 (KHTML, like Gecko) Version/8.0 Safari/601.1 WPE ComcastAppPlatform PN40-551-24U Firebolt/0.8.1 GNU/Linux Unknown
Mozilla/5.0 (Linux; x86_64 GNU/Linux) AppleWebKit/601.1 (KHTML, like Gecko) Version/8.0 Safari/601.1 WPE ComcastAppPlatform PX022AN Firebolt/0.8.1 AAMP/4.6 GNU/Linux Unknown
Mozilla/5.0 (Linux; x86_64 GNU/Linux) AppleWebKit/601.1 (KHTML, like Gecko) Version/8.0 Safari/601.1 WPE ComcastAppPlatform PX022AN RogersIgnite GNU/Linux Unknown
Mozilla/5.0 (Linux; x86_64 GNU/Linux) AppleWebKit/601.1 (KHTML, like Gecko) Version/8.0 Safari/601.1 WPE ComcastAppPlatform E550AE75C Firebolt/0.8.1 GNU/Linux Unknown
Mozilla/5.0 (Linux; x86_64 GNU/Linux) AppleWebKit/601.1 (KHTML, like Gecko) Version/8.0 Safari/601.1 WPE ComcastAppPlatform COESST11BEI Firebolt/1.7.0 GNU/Linux Unknown
Mozilla/5.0 (Linux; x86_64 GNU/Linux) AppleWebKit/601.1 (KHTML, like Gecko) Version/8.0 Safari/601.1 WPE ComcastAppPlatform SCXI11BEI Firebolt/1.7.0 1.0.0.0 Xfinity GNU/Linux Unknown
Mozilla/5.0 (Linux; x86_64 GNU/Linux) AppleWebKit/601.1 (KHTML, like Gecko) Version/8.0 Safari/601.1 WPE ComcastAppPlatform WX32HX2800 Firebolt/0.8.1 GNU/Linux Unknown