Mozilla and the Web as a whole have been taking steps to reduce the need for Flash content in everyday browsing. Starting in August, Firefox will block certain Flash content that is not essential to the user experience, while continuing to support legacy Flash content. These and future changes will bring Firefox users enhanced security, improved battery life, faster page load, and better browser responsiveness.
Seems like a wise move. What’s interesting here is the graph they show that details how the crash rates decreased dramatically when YouTube and Facebook switched to HTML5 video. I wonder if other browser vendors will follow suit?