Ken Kovash, over at the Metrics blog posts some significant information:
we’ve surpassed 60 million active daily users.
If I read this right, we have gained 10 million active daily users in just 6 months, moving from 50 million to 60 million. Firefox has gained 20% active daily users in just 6 months, which is nothing short of amazing
Now the Web is growing, but Firefox is growing faster that the Web itself, meaning that we're gaining market share in percentage. And wait 'til we ship Firefox 3: I'm betting that Firefox adoption will accelerate!