“For Firefox 4 minor updates will occur automatically. Users can change the setting in Options > Advanced > Update. We’ll only be using the major update dialog box for changes like 4 to 4.5 or 5” wrote Mozilla’s Alex Faaborg.
The implementation will be slightly different to Chromes, with users still seeing the updating progress bar on load, but this is an implementation issue, which will hopefully be addressed in the future.
The aim of this of course is to keep users safe, and take away the hassle of users having to install security updates when prompted.
Auto-updates are expected to appear in Firefox 4 before it is final release to the public later this year.