Codec extensions (malware) a été bloqué pour votre protection.

Pourquoi a-t-il été bloqué ?
The set of extensions labeled as Codec, Codec-M, Codec-C and other names are malware being distributed as genuine add-ons.

If you think an add-on you installed was incorrectly blocked and the block dialog pointed you to this page, please comment on this blog post.
Qui est affecté ?
All Firefox users who have installed any of these add-ons.
Qu'est-ce que cela signifie ?

Les modules ou greffons qui posent problème seront automatiquement désactivés et plus utilisables.

When Mozilla becomes aware of add-ons, plugins, or other third-party software that seriously compromises Firefox security, stability, or performance and meets certain criteria, the software may be blocked from general use. For more information, please read this support article.