Latest GNOME Web 3 user agents:

User Agent Platform Device
Mozilla/5.0 (X11; Ubuntu; Linux x86_64) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.0 Safari/605.1.15 Epiphany/3.16.0 Ubuntu Unknown
Mozilla/5.0 (X11; Ubuntu; Linux x86_64) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/11.0 Safari/605.1.15 Ubuntu/16.04 (3.18.11-0ubuntu1) Epiphany/3.18.11 Ubuntu 16 Unknown
Mozilla/5.0 (X11; Ubuntu; Linux x86_64) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/11.0 Safari/605.1.15 Epiphany/3.16.0 Ubuntu Unknown
Mozilla/5.0 (X11; Ubuntu; Linux i686) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/11.0 Safari/605.1.15 Ubuntu/16.04 (3.18.11-0ubuntu1) Epiphany/3.18.11 Ubuntu 16 Unknown
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/606 (KHTML, like Gecko) Version/16.0 Safari/606 Epiphany/3.32 GNU/Linux Unknown
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/605.1 (KHTML, like Gecko) Version/11.0 Safari/605.1 Debian/9.0 (3.22.7-1) Epiphany/3.22.7 Debian 9 Unknown
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/604.1 (KHTML, like Gecko) Version/11.0 Safari/604.1 elementary OS/0.4 (Loki) Epiphany/3.18.11 GNU/Linux Unknown
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/601.1 (KHTML, like Gecko) Version/8.0 Safari/601.1 Epiphany/3.16.3 GNU/Linux Unknown
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/601.1 (KHTML, like Gecko) Version/8.0 Safari/601.1 Epiphany/3.16.0 GNU/Linux Unknown
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/601.1 (KHTML, like Gecko) Version/8.0 Safari/601.1 Debian/unstable (3.16.3-1) Epiphany/3.16.3 Debian Unknown
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/601.1 (KHTML, like Gecko) Version/8.0 Safari/601.1 Debian/unstable (3.14.1-1) Epiphany/3.14.1 Debian Unknown
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/538.15 (KHTML, like Gecko) Version/8.0 Safari/538.15 Ubuntu/14.10 (3.10.3-0ubuntu3) Epiphany/3.10.3 Ubuntu 14 Unknown
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/538.15 (KHTML, like Gecko) Version/8.0 Safari/538.15 Ubuntu/14.04 (3.10.3-0ubuntu2) Epiphany/3.10.3 Ubuntu 14 Unknown
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/538.15 (KHTML, like Gecko) Version/8.0 Safari/538.15 Epiphany/3.12.1 GNU/Linux Unknown
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/538.1 (KHTML, like Gecko) Chromium/25.0.1349.2 Chrome/25.0.1349.2 Safari/538.1 Debian/unstable (3.8.2-4) Epiphany/3.8.2 Debian Unknown
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/535.22+ (KHTML, like Gecko) Chromium/17.0.963.56 Chrome/17.0.963.56 Safari/535.22+ Debian/7.0 (3.4.2-2.1) Epiphany/3.4.2 Debian 7 Unknown
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/535.22 (KHTML, like Gecko) Chromium/17.0.963.56 Chrome/17.0.963.56 Safari/535.22 Debian/unstable (3.4.2-1 build1) Epiphany/3.4.2 Debian Unknown
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/535.22 (KHTML, like Gecko) Chromium/17.0.963.56 Chrome/17.0.963.56 Safari/535.22 Debian/unstable (3.4.0.1-2) Epiphany/3.4.0.1 Debian Unknown
Mozilla/5.0 (X11; Linux i686) AppleWebKit/538.15 (KHTML, like Gecko) Version/8.0 Safari/538.15 Ubuntu/14.04 (3.10.3-0ubuntu2) Epiphany/3.10.3 Ubuntu 14 Unknown
Mozilla/5.0 (X11; Linux i686) AppleWebKit/537.6 (KHTML, like Gecko) Chromium/17.0.963.56 Chrome/17.0.963.56 Safari/537.6 Ubuntu/12.10 (3.6.1-0ubuntu1) Epiphany/3.6.1 Ubuntu 12 Unknown