> mailing list thread about the problem Here: https://lists.gnu.org/archive/html/bug-gnuzilla/2018-12/msg00004.html
For themes, I document the issue here: https://git.251.sh/Build/Debian/Icecat/issues/1 Basically, Icecat think the extension or theme is corrupt, which is not.
-- http://gnuzilla.gnu.org
