FR: Show browser extension stats on site-admin page

Closed Issue created 6 years ago by Warren Gifford

Created by: francisschmaltz

In the same way as https://github.com/sourcegraph/sourcegraph/pull/1018 we should show browser extension usage stats to the site admin.

There should be a single stat that we show and then the line can expand to show more information and any external links.

Here is a mock of how it should look:

Activity