I read on the LibreOffice here that said you could use Firefox Personas on LibreOffice 4.
Is this true, or did I mus-interpret this?
You can, indeed, customize LibreOffice with Firefox 'personas'.
In LibreOffice, go to the menu Tools | Options. Under "LibreOffice", select Personalize (№ 1 in the image, below).
Click the button Select Persona (№ 2). A new dialog will open. Click the button Visit Firefox Personas (№ 3) or visit http://www.getpersonas.com/.
Then you'll have to find a Firefox 'Persona' that you like and copy its URI address back in the LibreOffice dialog (№ 4).
Click "Accept" and you're done.
Image from this article.
And this is one I use: