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"Mozilla on Tuesday announced a massive change to the way it loads third-party plugins in Firefox. The company plans to enable Click to Play for all versions of all plugins, except the latest release of Flash.\r\n\r\nThis essentially means Firefox will soon only load third-party plugins when users click to interact with the plugin. Currently, Firefox automatically loads any plugin requested by a website, unless Mozilla has blocked it for security reasons (which it has for old versions of Java, Silverlight, and Flash).\r\n\r\nGoing forward, Mozilla will essentially be blocking all plugins except the very latest version of Flash. The company won't say why it is exempting Adobe's plugin, but it's most likely because users expect their videos to play automatically (and advertisers expect their ads to load automatically).\r\n\r\nFirefox will thus only load plugins when you take the action of clicking to make a particular plugin play. Alternatively, you can also configure Click to Play so that it always run plugins on a particular website.\r\n\r\nTo implement this change, Mozilla still has to do the following:\r\n\r\nSet Click to Play for old versions of Flash (versions "^^<http://www.w3.org/2001/XMLSchema#string>
<http://thenextweb.com/apps/2013/01/29/mozilla-to-enable-click-to-play-for-all-firefox-plugins-by-default-except-the-latest-flash-version/?_escaped_fragment_=xU6Kp>