JQuery $.on() function and the 'click' handler

So I am using the $.on() function to assign the 'click' event to one of my buttons, and on certain browsers things worked well, but on Firefox there was a problem, specifically the button would refresh.
My original code:

      self.init = function() { 

           $('.search-btn').on('click', function() { 

                var searchTerm = $('#searchTerm').val(); 

                self.doSearch(searchTerm); 

           }); 

      };  

It turns out it was a mistake I made by not returning a value from the annoymous function, so it would stop flow of execution.

      self.init = function() { 

           $('.search-btn').on('click', function() { 

                var searchTerm = $('#searchTerm').val(); 

                self.doSearch(searchTerm); 

                return false; 

           }); 

      };