• Remove the scroll-bars
• Remove the menu bar
• Remove the address bar and all the buttons

Which left just the button status bar (which is easy to remove from the view menu) and the tab bar which auto hides unless you mouse over it. To remove these unneeded UI elements, I followed the following steps:

1. To remove the scroll-bars, open %FIREFOXHOME%/chrome/classic.jar and navigate to /skin/classic/global/, then edit the file scrollbars.css, replacing:
   scrollbar {
-moz-appearance: scrollbartrack-horizontal;
-moz-binding: url("chrome://global/content/bindings/scrollbar.xml#scrollbar");
cursor: default;
background: url("chrome://global/skin/scrollbar/slider.gif") scrollbar;
}
scrollbar[orient="vertical"]
{
-moz-appearance: scrollbartrack-vertical;
}
   with:
scrollbar {
display: none;
-moz-appearance: none;
}
Then save those changes and re-jar the file.
2. To remove the bars at the top, simply right click on the blank space on the menu bar and uncheck all the options.
3. To remove the menu bar, you’ll need to install this extension which will make the menu bar hide (which you can toggle with the alt key)

Now you should have a minimalist Firefox setup for maximum viewing pleasure. Some important keyboard shortcuts are listed below:

• <CTRL>-T – Open a new tab
• <CTRL>-L – Navigate to a URL
• <CTRL>-<TAB> – Switch between tabs
• <CTRL>-W – Close a tab
• <CTRL>-<SHIFT>-T – Open a recently closed tab
• <ALT>-<HOME> – Go home
• <ALT>-<RIGHTARROW> – Go forward
• <ALT>-<LEFTARROW> – Go back
• <ESC> – Stop a page from reloading
• F5 or <CTRL>-R – Reload a page

Hope you find this useful, if you have comments or other setups you like, feel free to comment below.

Peace and chow,

Ranok