Browser engines

Engines

Layout engines behind the browsers. Blink, WebKit, Gecko, and the rest.

WebKitApple’s layout engine — the heart of Safari and every iOS/iPadOS in-app browser. Chromium forks still advertise AppleWebKit in the UA for compatibility, but real WebKit is what you get on Apple’s stack.35M hits
GeckoMozilla’s layout engine behind Firefox and Firefox-derived browsers. Identifies itself with a Gecko/… rv:… token (and usually Firefox/…).11M hits
TridentMicrosoft’s classic Internet Explorer engine (IE 4–11). Still shows up in enterprise and legacy Windows traffic as Trident/… like Gecko.16M hits
KHTML KDE’s original HTML engine — the ancestor of WebKit. Mostly historical outside niche Konqueror builds.8.9K hits
PrestoOpera’s pre-Chromium engine. Retired when Opera moved to Blink; surviving Presto strings are historical.1.0M hits
EdgeHTMLMicrosoft’s short-lived Edge engine — a cleaned-up Trident fork used by legacy Edge before the Chromium switch. UAs use Edge/… (not the modern Edg/ token).6.0M hits
GoannaA Gecko fork by Moonchild Productions, used in Pale Moon and related browsers.3 hits
BlinkGoogle’s Chromium layout engine (a 2013 WebKit fork). Powers Chrome, Edge, Opera, Brave, Vivaldi, Samsung Internet, and most Android WebViews. In User-Agents it still often shows up as AppleWebKit/537.36.206M hits
NetSurfLightweight open-source engine used by the NetSurf browser (RISC OS, Linux, and friends).300 hits
ServoExperimental parallel layout engine started at Mozilla; research / embedding more than everyday browsing.78 hits
TasmanMicrosoft’s Mac IE 5 engine — historical only.

11 engines with real write-ups from our archive. Useragent API