HTML source displayed in Firebug in standard browser "View Source"?

Question

I have some HTML content generated via some PHP.

While investigating the css problem, I noticed through Firebug that some elements in the DOM were not organized as I expected. However, when I made the standard “View Source” in Firefox, it showed that everything was correct.

I know that the source displayed by Firebug is accurate, because the source that it represents to me corresponds to the aesthetic problem that I see on the screen, but I'm not sure what that means and how to explore further.

Why is this happening, and what initial version should I watch? (ps I do not have JavaScript on the website.)

Answer 1

Firebug DOM, , - , Firebug ( , ).

, . - DOM , -, . Firebug , , .

Answer 2

Firebug DOM .
View Source HTML, .

DOM Javascript, Firebug.
HTML- , Firebug.

View View Source , DOM, , Firebug.

Answer 3

Firebug , , . ( , yss css reset). , firebug , , , javascript, html, , JS.