とりあえず

daily

userChrome.cssとuserContent.cssはこれで行こっと。
userChrome.css

* {
  font-family: "Lucida Grande", "Hiragino Kaku Gothic Pro W3", sans-serif !important;
}
toolbarbutton.bookmark-item * {
font-size: 12px !important;
font-weight: normal !important;
}



userContent.css

input, textarea, select, tree {
font-family: "Lucida Grande", "ヒラギノ丸ゴ Pro W4", "Hiragino Maru Gothic Pro W4", sans-serif;
font-weight: normal;
font-size: 12px;
line-height: 120%;
}