The new Click to Play function will cover all plug-ins excluding the latest Flash version.
Mozilla has annouced a revamp to its Firefox browser which will prevent third party browser plug-ins from automatically loading to create a faster and safer browsing experience.
Users of older versions of Flash have to upgrade in a bid to avail automatic loading.
Mozilla security assurance director Michael Coates said that poorly designed third party plugins are the number one cause of crashes in Firefox and can severely degrade a user's experience on the Web.
"This is often seen in pauses while plugins are loaded and unloaded, high memory usage while browsing, and many unexpected crashes," Coates said.
"By only activating plugins that the user desires to load, we're helping eliminate pauses, crashes and other consequences of unwanted plugins."
Further, Mozilla is planning introduce the scheme for other plug-ins that include Silverlight, Java and Acrobat Reader among many others.
"Flash is deployed on a variety of websites users interact with on a regular basis," Coates said.
"At this time we believe the best balance of control, ease of use and security is to encourage users to adopt the current version of Flash by only applying Click to Play to outdated versions."