How much Rust in Firefox? You can see the chart here.
Repository contains scripts collecting the language statistics for
mozilla/gecko-dev repository. Gathered data then assembled into a pie chart
index.mustache.
Page is updated weekly with a Travis Cron job. See the date meta tag for
the exact build time.
Build json document with the language details:
dev/build-data ~/gecko-dev > data.json
Expand mustache template:
mustache data.json index.mustache > index.html