How to remove Switch Workspace icon on Launcher panel in ubuntu 12.04

I have never understand why it is impossible to remove from Launcher panel(vertical panel) Trash icon and Switch Workspace icon, most people do not use them and for some people it is even dangerous.

Here is a way to remove Switch Workspace icon:
1) Apply updated for 12.04 at least for December 1, on clean 12.04 this approach did not work for me.
2) Aplly following commands, copy-paste from here.

sudo add-apt-repository ppa:ikarosdev/unity-revamped 
sudo apt-get update && apt-get dist-upgrade

3) Restart the system and open

ccsm

, go to

Ubuntu Unity Plugin

switch to the

Experimental

tab and turn off

Show "Expo Icon" in the launcher

.

Trash icon still at panel :(, If you know how to remove it, please let me know.


Update: for 13.04 - there will be standard way to do this, link.

FF 3.5 remove newTab Button

rename /home/romani/.mozilla/firefox/u3p8un3p.default/chrome/userChrome-example.css
to //home/romani/.mozilla/firefox/u3p8un3p.default/chrome/userChrome.css

add ".tabs-newtab-button { display : none };"
after "@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"); /* set default namespace to XUL */"

If no such file "../chrome/userChrome.css" - create it and put:
.tabs-newtab-button { display : none };