The firmware delivered with Cura hasn't changed in 8 months (since Cura 2.6): https://github.com/Ultimaker/cura-binary-data/tree/master/cura/resources/firmware The firmware repositories themselves did change, for instance this one: https://github.com/Ultimaker/Ultimaker2Marlin/commit/aa496a8f3b09ed7333b162deb21de5a9d154898a However the changes made to the source code was only documentation so we didn't make a new build of the Ultimaker 2 firmware for that.   If there was a bu