The present invention relates to novel fluoromethanesulfonamides of the formula (I) or an N-oxide or a salt thereof or an acid addition salt thereof to an agrochemical composition, which comprises an auxiliary and at least one compound of formula (I) or an N-oxide or a salt thereof or an acid addition salt thereof to the use of compounds of formula (I), their N-oxides or their salts or their acid addition salts for controlling unwanted vegetation and to a method for controlling unwanted vegetation, which comprises allowing a herbicidally effective amount of at least one compound of formula (I) or a salt thereof or an acid adition salt thereof, or an agrochemical composition, to act on plants, their seeds and/or their habitat
