%bcond_without pgo # PGO-enabled build (requires working $DISPLAY == :100)
# - disabled shared_js - https://bugzilla.mozilla.org/show_bug.cgi?id=1039964
%bcond_with shared_js # shared libmozjs library [broken]
-%bcond_with system_icu # build with system ICU (disabled due to firefox 52 crashes with system icu 58.2 - testcase?)
+%bcond_without system_icu # build without system ICU
# On updating version, grab CVE links from:
# https://www.mozilla.org/security/known-vulnerabilities/firefox.html