Palemoon to Netscape-like transformation (at least?)

Likely if you want the good old classic UI just like the original Netscape browser from late 90s? Just use Pale Moon for better security and make the UI look like the classic one!

A late-90s Netscape browser look for Pale Moon.

Theme applies here is: https://addons.palemoon.org/addon/moonscape/

Addons to install:
Tab Mix Plus
Old Addon Manager
Downloads Window

Stuff applies to about:config in the browser:
browser.tabs.animate (sets to false)
browser.showQuitWarning (sets to true)

And you are all set! This is how we transform this browser!