Be careful with old versions!
These versions are displayed for reference and testing purposes. You should always use the latest version of an add-on.
Colors are now in hsl format rather than rgb.
Some icons as well as some background colors were changed compared to previous versions, it looks better now.
For Firefox versions older than 3.6 you can install the 1.5.9 version.
Para que lo sigan usando en las nuevas versiones de Firefox y a la misma vez sigan apoyando al Verde, vamos Campeon.