firefox-gnome-theme/theme/parts/entries.css

/* Entries */

@namespace xul "http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul";

/* Entries */
#urlbar,
#searchbar,
#search-box,
.findbar-textbox,
#loginTextbox,
#password1Textbox,
.tabsFilter,
#editBMPanel_namePicker,
#editBMPanel_tagsField,
.popup-notification-body input {
	-moz-appearance: none !important;
	background: var(--gnome-entry-background) !important;
	outline: 2px solid transparent !important;
	border: 0 !important;
	border-radius: 6px !important;
	box-shadow: none !important;
	color: var(--gnome-entry-color) !important;
	height: 34px !important;
	max-height: 34px !important;
	margin: 0 !important;
	padding: 6px !important;
	box-sizing: border-box;
	transition: outline 0.3s, outline-offset 0.3s;
}

/* Entries focused */
#urlbar[breakout][breakout-extend],
#urlbar[focused="true"]:not([suppress-focus-border]),
#searchbar:focus-within,
#search-box[focused], 
.findbar-textbox[focused],
.findbar-textbox:focus,
#loginTextbox:focus,
#password1Textbox:focus,
.tabsFilter[focused],
#editBMPanel_namePicker:focus-visible,
#editBMPanel_tagsField:focus-visible,
.popup-notification-body input:focus {
	outline: 2px solid var(--gnome-focused-urlbar-border-color) !important;
	outline-offset: -2px;
	-moz-outline-radius: 5px;
}

/* Inactive window entries */
#urlbar:-moz-window-inactive,
#searchbar:-moz-window-inactive,
#search-box:-moz-window-inactive,
.findbar-textbox:-moz-window-inactive,
#loginTextbox:-moz-window-inactive,
#password1Textbox:-moz-window-inactive,
.tabsFilter:-moz-window-inactive {
	color: var(--gnome-inactive-entry-color) !important;
	outline: 2px solid transparent !important;
}

/* Entries combined */
.findbar-textbox:not(.minimal) {
	border-top-right-radius: 0 !important;
	border-bottom-right-radius: 0 !important;
	border-right-width: 0 !important;
}
.findbar-textbox:not(.minimal)[focused], .findbar-textbox:not(.minimal):focus {
	-moz-outline-radius: 5px 0 0 5px !important;
}

/* Entry button */
.identity-box-button,
#tracking-protection-icon-container,
#notification-popup-box,
.urlbar-page-action,
.urlbar-icon {
	fill-opacity: 0.8 !important;
	transition: fill 0.3s, fill-opacity 0.3, opacity 0.3;
}

.identity-box-button:hover:not([open="true"]),
#tracking-protection-icon-container:hover:not([open="true"]),
#notification-popup-box:hover:not([open="true"]),
.urlbar-page-action:hover:not([open="true"]),
.urlbar-page-action:hover:not([open="true"]) .urlbar-icon,
.urlbar-icon:not([disabled]):hover {
    background: none !important;
	fill-opacity: 1 !important;	
}

.identity-box-button:hover:active,
.identity-box-button[open=true],
#tracking-protection-icon-container:hover:active,
#tracking-protection-icon-container[open=true],
#notification-popup-box:hover:active,
#notification-popup-box[open=true],
.urlbar-page-action:hover:active,
.urlbar-page-action[open=true],
.urlbar-page-action:hover:active .urlbar-icon,
.urlbar-page-action[open=true] .urlbar-icon {
	background: none !important;
	fill-opacity: 1 !important;	
}

/* Entries fixes */
#urlbar-container, #search-container {
	padding: 0 !important;
	margin: 0 3px !important;
}
#urlbar-input-container {
	background: transparent !important;
	border: 0 !important;
}
#urlbar, #searchbar {
	margin: 0 3px !important;
	padding: 0 3px !important;
}
.searchbar-textbox {
	border: 0 !important;
	padding: 0 !important;
	margin: 0 !important;
	min-height: auto !important;
}
#searchbar > .searchbar-textbox[focused] .searchbar-search-button:not(#hack) {
	margin: 0 !important;
}
#urlbar[focused="true"]:not([suppress-focus-border]) > #urlbar-background {
	outline: 0 !important;
}