Bug raised in Mozilla. https://bugzilla.mozilla.org/show_bug.cgi?id=1125641
Probably duplicate of : http://trisquel.info/en/forum/abrowser-unexpected-error-not-able-sync http://trisquel.info/en/issues/12416 http://trisquel.info/en/forum/impossible-de-configurer-icecat-sync https://trisquel.info/es/forum/%C2%BFsincronizar-marcadores-de-abrowser-con-firefox
