What was found
AFTER ENGINE START FA CALLED ON TAXI SPEAKING OF SULFUR/EGG SMELL THROUGHOUT THE CABIN. REPORT CAME FROM FIRST CLASS CABIN / GALLEY. IFE REBOOT OCCURRED ABOUT THE SAME TIME. REMOVED AND INSPECTED BOTH RECIRC FAN FILTERS WITH NTF. REMOVED AND REPLACED COFFEE MAKER #1 IAW B767 AMM 25-31. OPS + LEAK CK GOOD. AS PRECAUTION REMOVED AND REPLACED BOTH RECIRC FAN FILTERS IAW B767 AMM 21-25. OPS CHECK GOOD.