Comment 18 for bug 89071

Finally remembered to take my laptop to a better connection: yes, race condition (unless Google's insane enough to sniff connection speed and do different things, which I doubt but didn't check).

Over dialup, I get the install-blocked infobar with a broken edit button, and if I manually whitelist tools.google.com I get the install prompt; with the same build (and the same run-instance, for that matter) over a decent connection, I get the install prompt unless I remove addons.mozilla.org from the whitelist, in which case I get an infobar with a working edit button that adds amo.