State fire officials say a wildfire that began Sunday afternoon in the Sand Beach Road area of the Apalachicola River Wildlife and Environmental Area in central Franklin County has stopped its advance and now is more than 50 percent contained. “It’s not advancing forward any more as of right now,” said Chris Colburn, district manager for the Florida Fire Service. He said the fire began Sunday, April 19 at about 1:41 p.m. off Highway 65, just no…