Monthly Archives: January 2008

600,000,000 Add-on Downloads

In John Lilly’s blog post in November about Firefox market share, he said one of the most important factors for figuring out how Firefox is doing is the health of addons.mozilla.org (also known as AMO). AMO recently hit a few milestones, so I thought an update (or perhaps initial view) of the add-ons community was [...]

Firefox 3 extension compatibility chart

Here is a chart (renders correctly in Fx3) listing the top 95% of extensions, sized by usage. Helpful for tracking add-on compatibility with Firefox 3.

A New Milestone in Firefox Usage

John will likely soon be discussing last week’s milestone in more detail, but in the meantime, we just wanted to highlight that Firefox exceeded 50 million active daily users for the first time last Wednesday (for background on our usage metric, please read here). The most impressive part of this accomplishment – aside from [...]

Firefox 3 Extension Compatibility Status

In the following graphs, each bar represents one of the top 100 extensions, by usage. The high of the bar is comparing relative usage. I.e. the most used extensions have the highest bars. Positive bars are compatible (blue), non-positive are not compatible (red).
Top 100 extensions claiming beta support (3.0b*, blue), non beta support (3.0b* red)

Top [...]

What factors affect Firefox usage?

A few months ago, we provided some initial analysis about how Firefox usage varies by day of the week (e.g., Wednesday vs. Saturday). We’ve since attempted to improve upon that analysis by making sure we’re accounting for everything in our statistical equation, allowing us to correctly isolate certain effects. For example, there is [...]