Latest OS/2 4 user agents:

User Agent Browser Device
Mozilla/5.0 (OS/2; Warp 4.5; Trident/7.0; rv:11.0) like Gecko Internet Explorer 11 Unknown
Mozilla/5.0 (OS/2; Warp 4.5; rv:45.0) Gecko/20100101 Firefox/45.0 SeaMonkey/2.42.9esr Lightning/4.7.9 Unknown Unknown
Mozilla/5.0 (OS/2; Warp 4.5; rv:38.0) Gecko/20100101 Firefox/38.0 [ip:213.32.4.102] Firefox 38 Unknown
Mozilla/5.0 (OS/2; Warp 4.5; rv:38.0) Gecko/20100101 Firefox/38.0 SeaMonkey/2.35 Lightning/4.0.8 Unknown Unknown
Mozilla/5.0 (OS/2; Warp 4.5; rv:38.0) Gecko/20100101 Firefox/38. Firefox 38 Unknown
Mozilla/5.0 (OS/2; Warp 4.5; rv:2.0.1) Gecko/20100101 Firefox/4.0.1 Firefox 4 Unknown
Mozilla/5.0 (OS/2; Warp 4.5; rv:132.0) Gecko/20100101 Opera/116.0 Opera 116 Unknown
Mozilla/5.0 (OS/2; Warp 4.5; rv:132.0) Gecko/20100101 Chrome/132.0.0.0 Chrome 132 Unknown
Mozilla/5.0 (OS/2; Warp 4.5; rv:10.0.12) Gecko/20130108 Firefox/10.0.12 SeaMonkey/2.7.2a Unknown Unknown
Mozilla/5.0 (OS/2; Warp 4.52; rv:1.0.1) Gecko/20100101 Netscape/4.79 Netscape 4 Unknown
Mozilla/5.0 (OS/2; Warp 4.5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.7049.95 Safari/537.36 Chrome 135 Unknown
Mozilla/5.0 (OS/2; Warp 4.5; rv:31.0) Gecko/20100101 Firefox/31.0 Firefox 31 Unknown
Mozilla/5.0 (OS/2; Warp 4.5; rv:24.0) Gecko/20100101 Firefox/24.0 SeaMonkey/2.21 Unknown Unknown
Mozilla/5.0 (OS/2; Warp 4.5; rv:24.0) Gecko/20100101 Firefox/24.0 Firefox 24 Unknown
Mozilla/5.0 (OS/2; Warp 4.5; rv:45.0) Gecko/20100101 Firefox/45.0 SeaMonkey/2.42.9esr Unknown Unknown
Mozilla/5.0 (OS/2; Warp 4.5; rv:10.0.12) Gecko/20130108 Firefox/10.0.12 SeaMonkey/2.7.2 Unknown Unknown
Mozilla/5.0 (OS/2; Warp 4.5; rv:38.0) Gecko/20100101 Firefox/38.0 SeaMonkey/2.35 Unknown Unknown
Mozilla/5.0 (OS/2; Warp 4.5; rv:31.0) Gecko/20100101 Firefox/31.0 SeaMonkey/2.28 Unknown Unknown
Mozilla/5.0 (OS/2; Warp 4.5; rv:38.0) Gecko/20100101 Firefox/38.0 Firefox 38 Unknown
Mozilla/5.0 (OS/2; Warp 4.5; rv:45.0) Gecko/20100101 Firefox/45.0 Firefox 45 Unknown