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How do you make the screen smaller so I can see the theme?

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I downloaded a Charlie Brown theme and because the Firefox screen is so big, I can only see the top of Charlie Brown and Snoopys heads.

I downloaded a Charlie Brown theme and because the Firefox screen is so big, I can only see the top of Charlie Brown and Snoopys heads.

Saafara biñ tànn

Assuming that you are talking about a Lightweight Theme (formerly known as Personas), the upper image won't be completely displayed unless you have 6 to 9 Toolbars being displayed at the top of the browser window.
https://addons.mozilla.org/en-US/firefox/themes/

If you want to see more of that image, add some blank Toolbars via the "Customize" feature.
https://support.mozilla.org/en-US/kb/customize-firefox-controls-buttons-and-toolbars
You'll need to add at least a Blank Space to each new Toolbar you create, or the new Toolbar won't save - can't be totally empty.

Jàng tontu lii ci fi mu bokk 👍 0

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Saafara yiñ Tànn

Assuming that you are talking about a Lightweight Theme (formerly known as Personas), the upper image won't be completely displayed unless you have 6 to 9 Toolbars being displayed at the top of the browser window.
https://addons.mozilla.org/en-US/firefox/themes/

If you want to see more of that image, add some blank Toolbars via the "Customize" feature.
https://support.mozilla.org/en-US/kb/customize-firefox-controls-buttons-and-toolbars
You'll need to add at least a Blank Space to each new Toolbar you create, or the new Toolbar won't save - can't be totally empty.