v1.x (v1.0: Chromium 18, v1.5 & v1.6: Chromium 28)
Originally based on the stock Android browser (AOSP), 2012.
"It was around early 2013 when we made [the decision to move to Chromium]. We shipped our first Chromium-based browser in one of the Galaxy S4 models released later in 2013." (Source)
- v1.0 preloaded in Galaxy S4
- v1.5 preloaded in Galaxy Note 3