Sibelius Scorch plugin has been blocked for your protection.

Why was it blocked?
The Sibelius Scorch plugin is not compatible with Firefox 18 and above, and is crashing whenever loaded on affected versions of Firefox.
Who is affected?
All users who have Firefox 18 or above installed, and the Sibelius Scorch plugin.
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.