guesses problems reasons instead of try to debug I worked with person who told his/her manager that "they [mozilla] decreased stack size in firefox[0] and that

guesses problems reasons instead of try to debug I worked with person who told his/her manager that "they [mozilla] decreased stack size in firefox[0] and that's why app doesn't work because there was a lot of recursive calls under the hood cuz they used knockout.js or something like that" the actual reason was some null or some other trivial thing [0] I checked that later and they even increased it in last versions.