Add extra empty toolbars if you want to see more of the persona.
You can create new toolbars via View > Toolbars > Customize
You have to place something on a toolbar (drag a Space item onto it) before closing the Customize window as empty toolbars are automatically removed.

See http://kb.mozillazine.org/Toolbar_customization

That worked perfectly, thank you so much!

You're welcome

Please Help! I tried this and it just won't work. When I close the customize toolbar window all the tool bars disappear and the browser goes back to original size. I've put spacers on it, I've put icons on it but the new tool bar won't stay. I must be doing something wrong. Using Windows XP with Firefox 3.6.13

See http://kb.mozillazine.org/Corrupt_localstore.rdf

Hi - I marked tpach's post as 'helpful' because I realised that I'm not alone in experiencing the same problem - i.e. my browser header does not show a full persona, vertically. I also tried cor-el's instructions. It seemed to work, but as soon as I clicked 'done', the browser header shrank back to size. Bah! It really does spoil the look of the personas, as some is always missing. FYI, I use Windows Vista with Firefox 3.6.13. Any help, please?!

Further to my post above, I have persevered with the instructions given by cor-el about adding (customising) toolbars on the browser header. Each time I added a toolbar, I got more creative in the positioning of icons. Through trial and error I can now see all of my chosen persona. Thanks again cor-el!

Tpach, if you read this, have another go. Believe me, I was having big problems in adding bars, and making them 'stay' with the added 'drag across' icons. It might just pay off. Good luck.

If you right click> customise> Add New Toolbar, a little box pops up asking for a name. I usually name them Extra1, Extra 2, Extra 3 etc.

When you have done that, click and drag a Flexible Space onto your new toolbar area (you could also use a space but I prefer to use a felxible one as you can clearly see it fill the toolbar area). When you see your white space 'land' on the area, click "Done".

If you repeat this step a few times, after you have about 5 extra toolbars, if you right click on the toolbar area, you should be able to see a list of all of them. Now you can tick/untick as many as you need to display your persona.

I do admit, this is a pain in the neck! I find that some personas show the entire image with only 2 extra toolbars and others take about 8! But by the time you have done that, your browsing window is so small as the persona takes up a third of the screen, it's not worth it!

If aynone knows how to find out the resolution of your own browser toolbar area, so that you can fit an image in the top right corner - WITHOUT it being cropped and WITHOUT having to add mutiple additional toolbars, please let me know!

You can create one toolbar (name: PersonaFiller) via "View > Toolbars > Customize" and put a single Space item on it and use code in userChrome.css to set a min-height for that toolbar.

If you do not want to see that toolbar to get more website space then you only need to remove one check-mark via the right-click context menu.

Add code to userChrome.css below the @namespace line.

@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"); /* only needed once */
#__customToolbar_PersonaFiller {min-height:100px !important;}