Please add the following rule to the netscaler caching for AMO: If the cookie "AMOfbUser" exists, addons.mozilla.org/services/update.php should not be cached. services/update.php is the actual filename, but I think clients use the rewritten addons.mozilla.org/update/VersionCheck.php So maybe anything with "update" in it shouldn't be cached.
The rule is in place.
It looks like the rule wasn't added to the .nl netscalers - users there aren't able to auto-detect add-ons.
Rule added to nl netscalers.