Omnibox in a non-english Tor Browser has no Disconnect.me as search engine in 6.0a5

We lost Disconnect.me as search engine somehow in our non-en-US bundles. Seems legacy/trac#11236 (moved) is showing its ugly head again (see comment 9 and https://bugzilla.mozilla.org/show_bug.cgi?id=1126722). Sad that our test suite is broken by the transition to ESR45 as well otherwise we would have caught this one earlier (too) :/