Arcsidebar 0.4.9

• Badge icons other extensions set (like Tab Driver's robot) sit between the
  favicon or sound icon and the title, and look like the sound button instead
  of taking the space's color. A pulsing icon shows a small blinking green dot
  instead of blinking itself.

Install: download arc-0.4.9.xpi below and open it in Firefox. Installed copies update themselves.