de rsjtdrjgfuzkfg (desarrollador) el Mar. 7, 2016 · enlace permanente

This is due to the fact that Mozilla actively prevents users from finding addons that do not pass a so-called "full review". A full review requires an add-on to not trigger compatibility issues, and moving a toolbar has tons of possible issues. Thus, this add-on is marked as experimental (which is a good thing, as it indeed is likely to break stuff) and not available for in-application searching (which is imho a bad thing, but I guess we can be happy that Mozilla permits such add-ons at all).