Electrical fuel pumps being off has caused more than a few incidences like this.
Two square green buttons above the skipper's head. Press them in, and the engines will probably continue running during the climb-out. Do not press them in, and the engines will probably continue running during the climb-out . . . but not as probably as with them in.
That a manufacturer could make a system that allowed full power with these off - and no kind of config warning - is beyond credulity.
That a manufacturer could publish their book of words and not have these turned off in the Engine Fire checklist, is also beyond credulity.
N.B. If it is a requirement now, it might be because I, and no doubt many others, proved that one other failure might allow boosted fuel into a fire.