Why does the Libredict Addon doesn't work in Tor Browser?

Why does the Libredict Addon (LibRedirect – Get this Extension for 🦊 Firefox (en-US)) doesn’t work in the Tor Browser?
Tor seems to deactivate the addon automaticly and i can do nothing against it

The Tor Browser shouldn’t be used with any extensions, except for NoScript.

The plugin you are trying to use might need some function that isn’t available in Tor Browser.