Hi Vasdom,
In Safari you chose (Entwickler), might be "Developer" or something like this. In the German Version it is the six th from left. There you chose (Seitenquelltext), so it might something like Code, Source Code or Page source.
This Code can be copied and pasted into muse. The code from your html, created out of Open Office or Word could also be embedded directly into muse but it looks much better with embedding the single webpage.
I did ask the same question in the german forum as well. They did as of this reading do not really know how to help. From there I found a workaround from Open Office and "send" as html.
This is the recommended way to do. I tried right now to "export" as html. In Open Office I was directed through some settings including pdf, which I all denied.
But the result was a pdf file that, once this file was directly opened with Adobe Reader, was readable as text (copy and paste was possible). Paste the file with drag and drop into muse leads only to a file inside the elements palette,
which says there is something to upload. Don`t know what happens with this.
In the german version of the forum I added the idea of some tabs, tiny mcd, to add tabs.
Feel free to ask, if you think I can help. I guess (and this is really not fair from ADOBE) you have to do all settings, colours, paddings and stuff inside Open Office or Word, so far. Very poor from ADOBE.
Uwe