Bug 1383896 added this constant to testing/talos/talos/config.py: > FAR_IN_FUTURE = 7258114800 which is used as the value for the "places.database.lastMaintenance" pref. (7258114800 seconds after 1970 is the start of the year 2200.) libpref stores integers prefs as int32_t and the current parser doesn't detect overflow. So this overflows to -1331819792. (I detected this with the new prefs parser from bug 1423840, which does detect integer overflow.) As a result the condition testing this pref in toolkit/components/places/PlacesCategoriesStarter.js ends up always succeeding in tests, which is the exact opposite of what was intended. This patch changes it to 2147483647 (the year 2038), the maximum int32_t value. (Note: this is much the same as bug 1424030, which was fixed recently.) Review commit: https://reviewboard.mozilla.org/r/217082/diff/#index_header See other reviews: https://reviewboard.mozilla.org/r/217082/