Multi-row is laggy Noté 2 sur 5 étoiles

Having tabs on multiple rows has somewhat become a necessity for me, and it was working perfectly until 3.6.15, but since Firefox 4, enabling this function has caused Firefox to become laggy as soon as you open the first tab in the second row. I've been forced to move to Tab Mix Utilities and thankfully, this addon did not slow down Firefox with multiple rows.

Cette critique concerne une version précédente du module ( 

Post your problem in the support forum to get further help.