Latest Facebook 59 user agents:

User Agent Platform Device
Mozilla/5.0 (Linux; U; Android 4.3; es-us; SCH-R530X Build/JSS15J) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/59.0.0.15.313;] Android 4 Galaxy S III LTE
Mozilla/5.0 (Linux; U; Android 4.3; en-us; SCH-N719 Build/JSS15J) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/59.0.0.0.138;] Android 4 Galaxy Note II
Mozilla/5.0 (Linux; U; Android 4.3; en-cn; HTC X920e Build/JSS15J) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/59.0.0.0.189;] Android 4 X920e
Mozilla/5.0 (Linux; U; Android 4.2.2; en-in; Micromax A068 Build/JDQ39) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/59.0.0.15.313;] Android 4 A068
Mozilla/5.0 (Linux; U; Android 4.1.2; en-us; SCH-I939 Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/59.0.0.15.313;] Android 4 Galaxy S III
Mozilla/5.0 (Linux; U; Android 4.1.2; en-us; LG-LS720 Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/59.0.0.15.313;] Android 4 LS720
Mozilla/5.0 (Linux; U; Android 4.1.2; en-us; LG-AS780 Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/59.0.0.15.313;] Android 4 AS780
Mozilla/5.0 (Linux; U; Android 4.1.2; en-ca; LG-E971 Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/59.0.0.15.313;] Android 4 E971
Mozilla/5.0 (Linux; U; Android 4.1.2; en-ca; LG-E450B Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/59.0.0.15.313;] Android 4 Optimus L5 II
Mozilla/5.0 (Linux; U; Android 4.1.2; en-ca; LG-E410B Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/59.0.0.15.313;] Android 4 Optimus L1 II
Mozilla/5.0 (Linux; U; Android 4.1.2; en-ca; GT-I9100M Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/59.0.0.15.313;] Android 4 Galaxy S II
Mozilla/5.0 (Linux; U; Android 4.0.4; en-us; LG-US730 Build/IMM76L) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/59.0.0.15.313;] Android 4 US730
Mozilla/5.0 (Linux; U; Android 4.0.3; en-gb; U9200 Build/HuaweiU9200C02B023) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/59.0.0.15.313;] Android 4 Ascend P1
Mozilla/5.0 (Linux; U; Android 4.0.3; en-en; HTC T327w Build/IML74K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/59.0.0.15.313;] Android 4 T327w
Mozilla/5.0 (Linux; U; Android 4.0.3; en-ca; HTC-Z710a Build/IML74K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/59.0.0.15.313;] Android 4 Z710a
Mozilla/5.0 (Linux; U; Android 4.0.3; en-ca; HTC-X710a Build/IML74K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/59.0.0.15.313;] Android 4 X710a
Mozilla/5.0 (Linux; Android 5.1; MT2L03 Build/HuaweiMT2L03) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/39.0.0.0 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/59.0.0.15.313;] Android 5 Ascend Mate 2
Mozilla/5.0 (Linux; Android 5.1; HTC 0PGQ1 Build/LMY47O; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/43.0.2357.121 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/59.0.0.15.313;] Android 5 0PGQ1
Mozilla/5.0 (Linux; Android 5.0.1; LG-F240L Build/LRX21Y; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/47.0.2526.100 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/59.0.0.15.313;] Android 5 Optimus G Pro
Mozilla/5.0 (Linux; Android 4.4.3; HTC Desire 612 Build/KTU84L) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/33.0.0.0 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/59.0.0.15.313;] Android 4 Desire 612