Is the HTML shown via 'View Source' different from the HTML shown in (Firebug) developer tools?

Question

I\'m using Firefox alongside Firebug Developer tools.

Is the HTML shown in View Source (Ctrl + U) different from the HTML I see when inspecting elements

Answer 1

The difference are (but not limited to) that in firebug console you can see dynamically changes, which occurred in web page. For example, DOM elements modifications (from AJAX or regular JavaScript), CSS in-place modifications, etc...