What you just described is literally nothing like the level of low-level customization that past releases of the Mozilla Suite/Firefox had to offer. Not only ca

What you just described is literally nothing like the level of low-level customization that past releases of the Mozilla Suite/Firefox had to offer. Not only can extensions no longer modify any of the browser XUL/chrome://, you can't even install Complete Themes that previous let you control the layout of every single browser css element. It's like Mozilla is deliberately committing corporate suicide with these hasty feature removals.