Just a few minutes ago, I deployed some updates to hg.mozilla.org to display more metadata on changeset pages. See 4b69a62d1905, dc4023d54436, and b617a57d6bf1 for examples of what's shown.

We currently display:

• More detailed pushlog info. (Before you had to load another page to see things like the date of the push.)
• The list of reviewers, each being a link that searches for other changesets they've reviewed.
• A concise list of bugs referenced in the commit message.
• Links to changesets that were backed out by this changeset.
• On changesets that were backed out, we may also display a message that the changeset was backed out.
• For Firefox repos, we also display the application milestone. This is the Gecko/app version recorded in the config/milestone.txt file in that changeset. The value can be used to quickly answer the question What versions of Firefox have this changeset.

If you notice any issues or have requests for new features, please file a bug.

This work is built on top of a feature I added to Mercurial 3.4 to make it easier to inject extra data into Mercurial's web templates. We just deployed Mercurial 3.4.1 to hg.mozilla.org yesterday. It's worth noting that this deployment happened in the middle of the day with no user-perceived downtime. This is a far cry from where we were a year ago, when any server change required a maintenance window. We've invested a lot of work into a test suite for this service so we can continuously deploy without fear of breaking things. Moving fast feels so good.

http://gregoryszorc.com/blog/2015/06/04/changeset-metadata-on-hg.mozilla.org