comScore RelevantKnowledge has been blocked for your protection.

Why was it blocked?
This add-on causes a high volume of Firefox crashes.
Who is affected?
Users of RelevantKnowledge version 1.3.328.4 and older in Firefox 4 and later.
What does this mean?

Users are strongly encouraged to disable the problematic add-on or plugin, but may choose to continue using it if they accept the risks described.

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.