Add some Toolbars to see the entire height of the persona image = 3000px by 200px (I don't think the full width of the Persona image can be seen on anything except a wide screen TV display).

Firefox comes with 3 Toolbars, the Menu bar, the Navigation bar, and the Bookmarks toolbar. It may vary depending on your operating system and whether you have Large or Small toolbar icons selected, but on my system I need to have 10 toolbars showing to see the full height of the Persona I have selected. YMMV

View > Toolbars - Customize Then hit the Add New Toolbar button, name that new toolbar (I named them Spacer 1 -7), and then add a single Space to each new Toolbar. Repeat until you have 7 more Toolbars. When you're done - hit the Done button.

Thank you! I did this, and also installed the add-on for moving toolbars around, and moved the buttons around on my toolbars, and now it all looks great! :)

You're welcome.

After I add the 7 spacers and hit DONE, it reverts back to the 3/4 view of the persona.

You don't have to add another add-on to move the Navigation Toolbar. All you have to do is go to View>Customize>Add Another Toolbar. And then, instead of choosing the Spacer icon, click on and drag everything you want to move to that blank toolbar; i.e., refresh button, back and forward buttons, home, navigation, etc. If you don't create a blank toolbar first, when you drop what you are moving, it will appear to the left of the toolbar you drop it on. And, the more you move down, the further to the right that toolbar moves until it is nearly off the screen. This way is simple, easy, and fast. And the best part is that you can now see the eyes and/or expressions of your new persona.

I am not computer savy,but still learning!