In addition to Chick-fil-A and Taco Bell, McDonald's and Wendy's are among the first names that come to mind .
When one considers the most popular fast food restaurants in the United States.
While McDonald's topped QSR's ranking of the 50 most profitable fast food outlets in America last year.
Wendy's came in at number five.
However, Wendy's is aware of its rivals, so it not only improved its fry recipe from the previous year to make firmer.
Moreover, the firm dissed McDonald's by producing fries that looked like those that had sagged.