This document explains V8’s version numbering scheme.| v8.dev
| chromiumdash.appspot.com
1fbb988 Version 12.1.285.28 by V8 Autoroll · 1 year, 7 months ago 12.1-lkgr chromium/6167 chromium/6167_184 12.1.285.28 12.1.285.28-pgo| chromium.googlesource.com
9bf2a5a Version 9.4.146.26 by V8 Autoroll · 3 years, 8 months ago 9.4-lkgr 9.4.146.26| chromium.googlesource.com
V8 JavaScript Engine| chromium.googlesource.com