Java Web Start is an Oracle technology that lets users single-click launch a Java app from within a browser without first downloading the app to the machine.

And Apple wasn't the only browser maker to recently block Adobe software. On Friday, , citing compatibility problems that resulted in blank pages appearing when users clicked on a link to a PDF document.

Mozilla maintains a blocklist for extensions or plug-ins that cause significant security or performance issues in Firefox. The browser automatically queries the blocklist and notifies users before disabling the targeted plug-in.

According to Mozilla, it's working with Adobe on a fix to Reader but will keep the plug-in on its blocklist until one is available.

can be downloaded from Apple's website. Mac users will be notified of the new version automatically by OS X's Software Update, while Windows users already running Safari will be alerted by a separate tool bundled with the browser.