List the names of the browser that are compatible with both 'CACHEbox' and 'Fasterfox'.
return browsers ;return #1 that  are compatible with  'CACHEbox ;return #1 that  are compatible with  'Fasterfox ;return #1 in both #2 and #3 ;return the  names of #4
['select', 'filter', 'filter', 'intersection', 'project']