You will have the option to keep it enabled, and even if you disable it when prompted, you will have the option to re-enable it in the Add-ons Manager.
Mac OS X users who have this plugin installed will be prompted to disable it in the next 24 hours. For this reason we have decided to add the plugin to the blocklist. There are also reports of crashes when using the plugin in 32 bit mode. In the majority of cases, the plugin shows a blank page when a user clicks on a link to a PDF file. The Adobe Acrobat Reader plugin is currently causing problems for most Mac OS X users who have it installed.
