Better yet, it should learn from your manual corrections and the patterns you commonly mistake. One thing I do that confuses them is putting in extra letters I

Better yet, it should learn from your manual corrections and the patterns you commonly mistake. One thing I do that confuses them is putting in extra letters I think should probably be in there. Like 'pherosious' instead of 'ferocious' (Firefox recommends 'heterosporous' - because that's closer!).