Installing iCopyright plugin

I received an email about installing iCopyright as an addition to the WordPress toolbar. As far as I know, i do not have a WordPress toolbar, and don’t know what its purpose is. However, I do have reason to use newspaper content for other purposes than blogging and iCopyright looks useful in those cases.

I use various browsers on my iMac desktop. How do I install the WordPress toolbar on Chrome, Firefox, and Safari? How do I add iCopyright to the toolbar?

I will likely require step-by-step instructions. Thank you!