Firefox does that in 5, at least as far as I can tell. It also updates addons silently. The only reason I've noticed things were being updated is addons that show a "what's new in this version!" page.
For me (and apparently a large number of people in this thread), I won't consider switching to Chrome until they get more powerful extensions, namely TreeStyleTabs and Vimperator/Pentadactyl. The current stand ins completely pale in comparison.
For me (and apparently a large number of people in this thread), I won't consider switching to Chrome until they get more powerful extensions, namely TreeStyleTabs and Vimperator/Pentadactyl. The current stand ins completely pale in comparison.