What is different between chrome dev-tools and Firefox dev-tools?

Im new in JavaScript and I wrote this js code on console :`

    function test (){} 
    var a1 = new test();
     a1;//chrome dev-tool test()
     a1;// firefox dev-tool : object {}
`

and run that on chrome dev-tool and Firefox dev-tool and I saw different results .

1.in chrome : test{}
2.in Firefox: object{}

Solution 1:

chrome is essentially saying {} is an empty object that was constructed by a function with name test.Firefox is saying {} is an empty object of general construction from Object.the subtle difference is that Chrome is actively tracking ,as an internal property,the name of the actual function that did the construction , whereas other browses don t track that additional information.