Bug in Portable FF with some extensions

With a normal installation, everything is ok.
Only the portable ff versions exhibit this behavior.

Make a clean installation and change two parameters.
a) Restore tabs from the last session
b) Don't load tabs until selected

Install the CopyAllUrls extension.
https://addons.mozilla.org/en-US/firefox/addon/copyallurls/

Change the option and add title before URL.

Now open some different sites and restart FF.

Click on Edit -> Copy All Urls -> Copy
and paste the result in an editor window.

Result with normal installation

Title Tab1
Url Tab1

Title Tab2
Url Tab2

Title Tab...
Url Tab...

with portable ff I get only

Url Tab1
Url Tab1

Url Tab2
Url Tab2

Url Tab...
Url Tab...

I don't know why but it is not possible to
access
gBrowser.browsers[i].webNavigation.document.title
it's always empty.
Only
gBrowser.tabs[i].label;
works.

I think I have more bugs in many extensions because of this.
I'm using Win7 x64 and I have checked the last 5 versions of FF.