Mozilla is adopting a Microsoft technology to improve the user experience of Firefox users when installing updates.
From Firefox 70 onwards the browser will be using Windows Background Intelligent Service (BITS) to download updates for the browser in the background via a dedicated “Background Update agent.”
Firefox has in fact already been using the technology, but as part of the browser itself, which meant the trickle download service was often not able to download updates when users were only using the browser for short sessions.
The change was announced by Firefox Platform Engineer, Matt Howel who said:” The update agent is being planned as a background process which will remain running after the browser is closed to download and apply updates.”
The feature is currently being used in Firefox Nightlies and when fully implemented will mean the browser will no longer look for updates when you visit the About page.