Hi Whitehill,

To open in full screen for just one particulare application - I have no idea if that is possible, but maybe somebody else does ......

In the mean time, would you please take a look at this article (but you may already be familiar with this feature) :

https://support.mozilla.org/en-US/kb/how-make-firefox-and-websites-go-full-screen

I found this add-on, which probably is not what you want, but I thought I'd mention it, just in case :

https://addons.mozilla.org/en-US/firefox/addon/autofullscreen/?src=search

Thanks. can we make it it the default opening state?

Whitehill said

Can we make it it the default opening state?

As for the add-on : when I read what it says under 'About this extensions' I would expect it to open in full screen mode every time ......