Taking a page from Google Chrome, Mozilla introducing "behind-the-scenes updating" features into Firefox 4, which's currently "on track". "We'll only be using the major update dialog box for changes like [version] 4 to 4.5 or 5, including all security updates" Alex Faaborg said on mozilla dev forum. "Unfortunately users will still see updating progress bar on load, but this's an implementation issue as opposed to a [user interface] one; ideally the update could be applied in the background." Unlike Google, Mozilla will let users change the default silent service to the more traditional mode, where the browser asks permission before downloading and installing any update.
According to "Why Silent Updates Boost Security", 97% of Chrome users were running latest browser within 21 days of last update release. Faaborg and Robert Strong, the Mozilla engineer who has been writing the behind-the-scenes updater, defended the move toward a Chrome-like service.