Hi

I think that (along with other things) Chrome and Firefox handle this issue in different ways. With the work that we are currently doing on Firefox Preview, it may be the case the remote debugger is looked at again in a future update to Firefox.

Thanks Seburo,

 yea, it looks like when in firefox, the remote debugging will show you the javascript, css and html so you can debug them, and , it will show you the image of the current page on the phone. if i change pages in my web application on my phone, i can see that firefox on my laptop responds by showing me the css, javascript and html on the new page that is on my phone. BUT HERE IS THE COOL THING, if i go to my laptop firefox debugger and move the cursor over (hover) over the html, i can actually see these movements on my phone simultaneously!!
  so, i guess this is just the way firefox handling remote debugging? it does not show the image on the phone in the firefox debugger on my laptop like chrome does. so, these are the differences between chrome remote debugging and firefox debugging? 
 Just trying to know so i dont look for both of them to have the same features. 
  thanks so much for your advice

Ah, it looks like you have been able to replicate the same functionality, great news.

I have never tried to use the tools in chrome for this, but I am glad to hear that the Firefox tools are working for you.