Rated 1 out of 5 stars
I have used tab-counter for around 4 years. It is a tiny install and has always worked perfectly. From that stand-point, I give it 5 stars. However, when Firefox 4 was released, it took Gryllida quite some time to update tab-counter. Furthermore, since Firefox 29 was released, tab-counter has not worked at all because there is no status-bar or Add-on bar any longer. So, on those two counts, tab-counter gets 1 star.
Gryllida, please update tab-counter so that it isn't hard-coded to appear where it always has, but rather can be placed anywhere other "toolbar" icons can be. Perhaps, you might want to release the new update as tab-counter 2.0 or v2 for those running Firefox 29+, but keep the old version (0.2.4) for anyone running Firefox versions 1-28, since 0.2.4 worked perfectly.
Gryllida, thank you for your Add-on and for an update!