Hello at all
First, thanks for yours answers
@Bisonte
Yes, with him i'm sure to find all the HTML showing in the page
But it's a pity that Mozilla never thinking to adding a "Save source" in this tools, it's surely very simple for do that
And a new time, i'm surprising to be the only one to need this option
@Plouf
Thanks for this tips
I don't know how i can do for have the full text with Wget, but there are surely examples on the NET
Your idea give to me an another, perhaps also Firefox in "headless mode"

But like Wget, i don't know how do that ...it's a way to excavate
@TassyJim
I have do your tips, and you have right apparently there are numerous files
The problem is the time and the difficulty for reconstitute the full code
It's all the more frustrating because we have this complete code in front of us, in the inspector, without being able to catch it.
@JhpJhp
Either way I'm surprised I haven't heard from you directly.
For all say to you, i have see all this miraculous code you create, and also the others codes with WebViewGadget, etc..finally all the codes about this magical Chromium
But you forget that KCC is "one neuronal equipped"
There are so many examples, of several technology that i'm really lost in all that
My dream since ten years has always been to remote Firefox as it was possible to control internet explorer with its OLE : "Simple to understand and use"
I always regretted that MOZILLA did not make a system like MICROSOFT did by using COM
It seems that he had initially created this style of commands, but that he had abandoned it later
I tried many methods over the years, that more or less worked to achieve my dream (Adding MozRepl addon or others, i have even create my own addon for inject JS since Mozilla delete the possiblility to send directly JS in the URL, Using Python controlled by PB, Sending message to Scratchpad (removed by Mozilla in version 72), Controlling the "GeckoDriver" engine, Using SELENIUM, Try to create PROXY, and numerous other methods again who not working....)
So, when I saw yours jewels although and i did not really understand what it was, I search and read on the internet that Firefox did not use CHROMIUM, so once again, I told myself that it was not for me
I searched since all this years to do scrapping with PB and Firefox, in one word fully remote the navigator and mainly the webpage on it
Because the problem is often the page need to connect with login and password, and it's impossible to access to the page without connecting
This is the reason why after ten years of research i have abandoned, because i'm tired to have amazing enjoy

folowing too much often by deep sadness
PS: i have see just now, someone have thinking to recreate the Scratchpad that Mozilla have deleted

maybe again a way to study
https://addons.mozilla.org/fr/firefox/addon/scratchpad/