theme problem Rated 4 out of 5 stars
Reason I couldn't find button was theme incompatibility(believe I was using chromifox extreme.
Installed HiViS theme and button showed up,extra star
Is it a bug report ?
If yes, can you please elaborate on http://closenforget.mozdev.org/bugs.html ?
Maybe do you use another add-on conficting, or a theme/skin with different button.