Firefox CSS Modification (from 140 onwards)

Like Firefox CSS Modification (up to 140 ESR), the following modifications are based on Aris-t2’s CustomCSSforFx project.

Please note that this diversion is not a hard split from the previous page, just that the modifications listed here on this page are not tested under versions earlier than 140.

And since Aris-t2 has indicated that he has no intention to further revise his said project, the modifications here henceforth shall all based on his final version, 4.7.5.

Modifications of CustomCSSforFx’s Original CSS Files

css/appbutton/appbutton_in_titlebar.css (CSS ver: 4.7.5; Firefox ver: 140–151)

  --appbutton_in_titlebar: 92px !important;

  height: 2rem !important;

  padding-inline-start: 0.81rem !important;
  padding-inline-end: 2.19rem !important;
  height: 2rem !important;

  margin-top: 5px !important;

For Firefox Nightly, do not change line 11, keep the value --appbutton_in_titlebar as 95.

css/generalui/popup_compact_menus.css (CSS ver: 4.7.5; Firefox ver: 140–151)

:root{
  --item_y_padding: 2px; /* old value: 2px */
  --y_padding_before_label: 28px !important; /* for popup_menus_space_before_label.css */
  --y_padding_before_label_bm: calc(var(--y_padding_before_label) - 26px ) !important; /* for popup_menus_space_before_label.css */
  --y_padding_before_label_sep: calc(var(--y_padding_before_label) - 26px ) !important; /* for popup_menus_space_before_label.css */
  --panel-padding: 0px !important;
  --arrowpanel-menuitem-margin: 0px !important;
  --arrowpanel-menuitem-padding: calc( var(--item_y_padding) + 1px) 2px !important;
  --panel-subview-body-padding: 0px !important;
}

.menu-icon{
  margin-inline-start: 2px !important;
  margin-inline-end: 6px !important;
}

  menupopup > menuitem,
  menupopup > menu {
	padding-block: 0 !important;
	padding: 0.08rem 0 0.29rem !important;
	padding-inline-start: 4px !important;
	padding-inline-end: 4px !important;
  }

css/generalui/popup_menus_space_before_label.css (CSS ver: 4.7.5; Firefox ver: 140–151)

	:is(popup,menupopup) :is(menu,menuitem):not(:is([checked]),.bookmark-item:not([label="(Empty)"]),.menu-iconic,.menuitem-iconic) {
	  padding-inline-start: var(--y_padding_before_label) !important;
	}

css/generalui/bookmark_icons_colorized.css (CSS ver: 4.7.5; Firefox ver: 140–151)

/* Bookmarks roots menu-items */
#subscribeToPageMenuitem:not([disabled]),
#subscribeToPageMenupopup {
  list-style-image: url("./../../image/feedIcon16.png") !important;
}

#bookmarksToolbarFolderMenu > :is(.menu-icon,.menu-iconic-icon),
#BMB_bookmarksToolbar > :is(.menu-icon,.menu-iconic-icon),
#editBMPanel_toolbarFolderItem > :is(.menu-icon, .toolbarbutton-icon) {
  content: url("./../../image/bookmarksToolbar.png") !important;
}

#menu_unsortedBookmarks > :is(.menu-icon,.menu-iconic-icon),
#BMB_unsortedBookmarks > :is(.menu-icon,.menu-iconic-icon),
#editBMPanel_unfiledRootItem > :is(.menu-icon,.menu-iconic-icon) {
  content: url("./../../image/unsortedBookmarks.png") !important;
}

.bookmark-item[container] > :is(.menu-icon),
.folder-icon > :is(.menu-icon, .toolbarbutton-icon) {
  content: url("./../../image/folder-item.png") !important;
}

/* "Other Bookmarks" For folder in the Bookmarks Toolbar */
#OtherBookmarks > :is(.menu-icon, .toolbarbutton-icon) {
  content: url("./../../image/unsortedBookmarks.png") !important;
}

/* Fx 139+*/

css/tabs/tab_audio_icon.css (CSS ver: 4.7.5; Firefox ver: 140–151)

.tab-audio-button {
  --button-size-icon-small: 22px !important;
  --button-min-height-small: 22px !important;
  --button-border-color-ghost: unset !important;
  --button-border-radius: 0 !important;
  background: rgba(255,255,255,0) !important;
  border-radius: 0 !important;
  scale: .9 !important;
  transform: translateY(-1px);
  margin-inline-start: -2px !important;
}

css/tabs/tab_context_menuitems_visibility.css (CSS ver: 4.7.5; Firefox ver: 140–151)

/* hide 'Reload Tab' menuitem */
#tabContextMenu #context_reloadTab {
  visibility: collapse !important;
  display: none !important;
}

/* hide 'Mute Tab' menuitem */
#tabContextMenu #context_toggleMuteTab {
  visibility: collapse !important;
  display: none !important;
}

/* hide separator after 'Mute Tab' menuitem */
#tabContextMenu #context_toggleMuteTab + menuseparator {
  visibility: collapse !important;
  display: none !important;
}

/* hide 'Duplicate Tab' menuitem */
#tabContextMenu #context_duplicateTab {
  visibility: collapse !important;
  display: none !important;
}

/* hide 'Move to New Window' menuitem */
#tabContextMenu #context_openTabInWindow {
  visibility: collapse !important;
  display: none !important;
}

/* hide separator after 'Move to New Window' menuitem */
#tabContextMenu #context_sendTabToDevice_separator {
  visibility: collapse !important;
  display: none !important;
}

/* hide 'Send Tab to Device' menuitem */
#tabContextMenu #context_sendTabToDevice {
  visibility: collapse !important;
  display: none !important;
}

/* hide separator after 'Send Tab to Device' menuitem */
#tabContextMenu #context_sendTabToDevice + menuseparator {
  visibility: collapse !important;
  display: none !important;
}

/* hide 'Reload All Tabs' menuitem */
#tabContextMenu #context_reloadAllTabs {
  visibility: collapse !important;
  display: none !important;
}

/* hide 'Bookmarks All Tabs...' menuitem */
#tabContextMenu #context_bookmarkAllTabs {
  visibility: collapse !important;
  display: none !important;
}

/* hide 'Close Tabs to the Right' menuitem */
#tabContextMenu #context_closeTabsToTheEnd {
  visibility: collapse !important;
  display: none !important;
}

/* hide 'Close Other Tabs' menuitem */
#tabContextMenu #context_closeOtherTabs {
  visibility: collapse !important;
  display: none !important;
}

/* hide separator after 'Close Other Tabs' menuitem */
#tabContextMenu #context_closeOtherTabs + menuseparator {
  visibility: collapse !important;
  display: none !important;
}

/* hide 'Reload Selected Tab' menuitem */
#context_reloadSelectedTabs {
  visibility: collapse !important;
  display: none !important;
}

/* hide 'Close Tab' menuitem */
#tabContextMenu #context_closeTab {
  visibility: collapse !important;
  display: none !important;
}

/* hide 'Bookmark Tab' menuitem */
#tabContextMenu #context_bookmarkTab {
  visibility: collapse !important;
  display: none !important;
}

/* hide 'Select All Tabs' menuitem */
#tabContextMenu #context_selectAllTabs {
  visibility: collapse !important;
  display: none !important;
}

/* hide 'Move Tab' menuitem */
#tabContextMenu #context_moveTabOptions {
  visibility: collapse !important;
  display: none !important;
}

css/toolbars/toolbar_context_menuitems_visibility.css (CSS ver: 4.7.5; Firefox ver: 140–151)

/* hide 'Pin to Overflow Menu' menuitem */
#toolbar-context-menu .customize-context-moveToPanel {
  visibility: collapse !important;
  display: none !important;
}

Additional File Placement(s)

For Firefox 141 and above (currently tested up to 150), place the following CSS file in /chrome/css/ and then include it in my_userChrome.css with @import "./css/additional_menubar_tabstoolbar_adjustments_141.css";.

css/additional_menubar_tabstoolbar_adjustments_141.css (CSS ver: 4.7.5; Firefox ver: 141–151)

#urlbar:not(:focus-within) {
	border: 1px solid var(--urlbar_border_color) !important;
}

#main-window #toolbar-menubar:is([autohide="false"], :not([inactive="true"])) ~ #TabsToolbar,
#main-window:not([tabsintitlebar], [customtitlebar]) #TabsToolbar {
	padding-inline-start: 0 !important;
}
#main-window:is([tabsintitlebar], [customtitlebar]):is([sizemode="maximized"], :not([sizemode="maximized"])):is([uidensity=compact], :not([uidensity=compact])) #toolbar-menubar[autohide="true"][inactive="true"] ~ #TabsToolbar {
	padding-inline-start: calc(var(--appbutton_in_titlebar) - 0.5rem) !important;
}
#main-window:is([tabsintitlebar], [customtitlebar]):is([sizemode="fullscreen"], [sizemode="maximized"]) #toolbar-menubar:is([autohide="true"]:not([inactive="true"]), [autohide="false"]) {
	padding-top: 0.155rem !important;
}
#main-window:is([tabsintitlebar], [customtitlebar]) #toolbar-menubar:is([autohide="true"]:not([inactive="true"]), [autohide="false"]) ~ #TabsToolbar {
	margin-left: -0.064rem;
}
#main-window:is([tabsintitlebar], [customtitlebar]):is([sizemode="fullscreen"], [sizemode="maximized"]) #toolbar-menubar:is([autohide="true"][inactive="true"], [autohide="false"]) ~ #TabsToolbar,
#main-window:is([tabsintitlebar], [customtitlebar]):not([sizemode="fullscreen"], [sizemode="maximized"]) #toolbar-menubar[autohide="false"] ~ #TabsToolbar {
	margin-top: -0.1rem !important;
}
#main-window:is([tabsintitlebar], [customtitlebar]):is([sizemode="fullscreen"], [sizemode="maximized"]) #toolbar-menubar[autohide="true"]:not([inactive="true"]) ~ #TabsToolbar {
	margin-top: -0.85rem !important;
}
#main-window:not([tabsintitlebar], [customtitlebar])[sizemode="fullscreen"] #toolbar-menubar:not([inactive="true"]) ~ #TabsToolbar {
	margin-top: -0.25rem !important;
}
#main-window:is([tabsintitlebar], [customtitlebar]):not([sizemode="fullscreen"], [sizemode="maximized"]) #toolbar-menubar[autohide="true"][inactive="true"] ~ #TabsToolbar {
	margin-top: -0.14rem !important;
}
#main-window:is([tabsintitlebar], [customtitlebar]):not([sizemode="fullscreen"], [sizemode="maximized"]) #toolbar-menubar:is([autohide="true"]:not([inactive="true"]), [autohide="false"]) {
	padding-top: 0.133rem !important;
}
#main-window:is([tabsintitlebar], [customtitlebar]):not([sizemode="fullscreen"], [sizemode="maximized"]) #toolbar-menubar[autohide="true"]:not([inactive="true"]) ~ #TabsToolbar {
	margin-top: -0.88rem !important;
}
#main-window:not([tabsintitlebar], [customtitlebar])[sizemode="fullscreen"] #toolbar-menubar[inactive="true"] ~ #TabsToolbar {
	margin-top: -0.3rem !important;
}
#main-window:not([tabsintitlebar], [customtitlebar]):not([sizemode="fullscreen"]) #toolbar-menubar {
	padding: 0.15rem 0 0.2rem 0.2rem !important;
}
#main-window:not([tabsintitlebar], [customtitlebar])[sizemode="fullscreen"] #toolbar-menubar {
	padding: 0.15rem 0 0 0.2rem !important;
}
#main-window:not([tabsintitlebar], [customtitlebar])[sizemode="fullscreen"] #toolbar-menubar[autohide="true"]:not([inactive="true"]) ~ #TabsToolbar {
	margin-top: -0.4rem !important;
}
#main-window:not([tabsintitlebar], [customtitlebar]) #toolbar-menubar[inactive="true"] ~ #TabsToolbar {
	margin-top: -0.35rem;
}
#main-window:not([tabsintitlebar], [customtitlebar])[sizemode="fullscreen"] #toolbar-menubar[inactive="true"] ~ #TabsToolbar {
	margin-top: -0.3rem;
}
#main-window:not([tabsintitlebar], [customtitlebar]):is([sizemode="fullscreen"], [sizemode="maximized"]) #TabsToolbar {
	margin-left: -0.1rem;
}
#main-window:not([tabsintitlebar], [customtitlebar]):not([sizemode="fullscreen"], [sizemode="maximized"]) #TabsToolbar {
	margin-left: -0.08rem;
}
#main-window[sizemode="fullscreen"] #toolbar-menubar[autohide="false"] ~ #TabsToolbar .titlebar-buttonbox-container {
	visibility: collapse !important;
	display: none !important;
}

For Firefox 140, continue to use the additional_menubar_tabstoolbar_adjustments_133.css instead, as illustrated on the previous page.

userChrome.css & userContent.css Modifications and Additions

userChrome.css (CSS ver: 4.7.5; Firefox ver: 140–151)

/* @import "./css/buttons/icons_colorized.css"; /**/

/* @import "./css/buttons/buttons_on_navbar_classic_appearance.css"; /**/

/* @import "./css/buttons/bookmarks_menu_button_localized_label_on_bookmarks_toolbar.css"; /**/

@import "./css/buttons/back_and_forward_separated_history_popups.css"; /**/

@import "./css/appbutton/appbutton_popup_sync_hidden.css"; /**/
@import "./css/appbutton/appbutton_popup_logins_and_passwords_hidden.css"; /**/

@import "./css/appbutton/appbutton_on_navbar_start_position.css"; /**/

/* @import "./css/tabs/missing_tab_favicon_restored_default.css"; /**/

@import "./css/tabs/tab_audio_icon.css"; /**/

/* ------------------
   OTHER TAB SETTINGS
   ------------------
*/

/* @import "./css/tabs/tab_icon_colors.css"; /**/
/* @import "./css/tabs/tab_title_centered.css"; /**/
/* @import "./css/tabs/classic_squared_tabs_old_bordercolor_for_lwthemes.css"; /**/ /* has to be used along with 'classic_squared_tabs.css' */
/* @import "./css/tabs/tabs_fully_squared.css"; /**/

/* @import "./css/tabs/tabs_container_indicator_for_classic_squared_tabs.css"; /**/
/* @import "./css/tabs/tabs_active_tab_indicator_for_classic_squared_tabs.css"; /**/
/* @import "./css/tabs/newtab_tab_size_equals_tab_size.css"; /**/
/* @import "./css/tabs/newtab_button_always_visible.css"; /**/
/* @import "./css/tabs/tab_icon_inactive_tabs_lower_opacity.css"; /**/
/* @import "./css/tabs/tab_icon_unloaded_tabs_lower_opacity.css"; /**/
/* @import "./css/tabs/tab_maxwidth.css"; /**/
@import "./css/tabs/tab_titles_remove_blur.css"; /**/
/* @import "./css/tabs/alltabs_button_always_visible.css"; /**/  /* hidden, if multiple tab rows are used */
@import "./css/tabs/alltabs_button_only_visible_in_overflow_mode.css"; /**/ 
/* @import "./css/tabs/alltabs_button_always_hidden.css"; /**/ 
/* @import "./css/tabs/alltabs_button_old_icon.css"; /**/ 
/* @import "./css/tabs/pinnedtab_empty_favicon_hidden.css"; /**/

/* [!] edit target file to select which items to hide */
@import "./css/tabs/tab_context_menuitems_visibility.css"; /**/


/* ==========
   GENERAL UI
   ==========
*/

@import "./css/generalui/private_mode_indicator_hidden.css"; /**/
@import "./css/generalui/bookmark_icons_colorized.css"; /**/
/* @import "./css/generalui/searchbookmarks_hidden.css"; /**/
/* @import "./css/generalui/bookmarks_smaller_more_bookmarks_icon.css"; /**/
@import "./css/generalui/send_to_device_menuitems_hidden.css"; /**/
@import "./css/generalui/set_as_desktop_background_menuitems_hidden.css"; /**/

@import "./css/generalui/popup_compact_menus.css"; /**/
@import "./css/generalui/popup_compact_menus_squared.css"; /**/
/* @import "./css/generalui/popup_menus_menu_background.css"; /**/

/*
   [!] only use one option at a time
*/
/* @import "./css/generalui/popup_menus_space_before_label_fx128_139.css"; /**/ /* for Fx 128-139 */
@import "./css/generalui/popup_menus_space_before_label.css"; /**/ /* for Fx 140+ */

@import "./css/generalui/popup_animation_fade_time_reduced.css"; /**/

@import "./css/generalui/findbar_close_at_findbars_start.css"; /**/

@import "./css/toolbars/toolbar_context_menuitems_visibility.css"; /**/

@import "./css/toolbars/menubar_in_fullscreen_mode.css"; /**/

@import "./css/toolbars/bookmarks_toolbar_in_fullscreen_mode.css"; /**/

@import "./css/locationbar/urlbar_searchmode_switcher_hidden.css"; /**/ /* currently on Nightly */

@import "./css/locationbar/starbutton_popup_preview_image_hidden.css"; /**/

@import "./css/locationbar/starbutton_alternative_icon.css"; /**/

/* @import "./css/locationbar/urlbar_background_old_colors.css"; /**/

/* ---------------------------------------
   Megabar: popup content order/appearance
   ---------------------------------------
   
   [!] only use one option at a time
*/

/* @import "./css/locationbar/ac_popup_megabar_title_and_url_50percent_width.css"; /**/
/* @import "./css/locationbar/ac_popup_megabar_url_and_title_50percent_width.css"; /**/
@import "./css/locationbar/ac_popup_megabar_title_and_url_two_lines.css"; /**/
/* @import "./css/locationbar/ac_popup_megabar_url_only.css"; /**/


/* --------------------------------------------
   MEGABAR: result menuitem settings/appearance
   --------------------------------------------
*/

@import "./css/locationbar/ac_popup_megabar_compact_results.css"; /**/
@import "./css/locationbar/ac_popup_megabar_searchwith_and_visit_items_hidden.css"; /**/
@import "./css/locationbar/ac_popup_megabar_suggest_label_hidden.css"; /**/
@import "./css/locationbar/ac_popup_megabar_search_engines_hidden.css"; /**/

userContent.css (CSS ver: 4.7.5; Firefox ver: 140–151)

/* @import "./css/aboutaddons/addons_manager_alternative_appearance.css"; /**/

@import "./css/aboutaddons/addonlists_hide_report_button.css"; /**/

@import "./css/aboutaddons/addonlists_hide_recommended_icon.css"; /**/
/* @import "./css/aboutaddons/addonlists_hide_allowed_in_private_windows_icon.css"; /**/
@import "./css/aboutaddons/recentupdates_category_always_visible.css"; /**/
@import "./css/aboutaddons/availableupdates_category_always_visible.css"; /**/
@import "./css/aboutaddons/availableupdates_category_last_category.css"; /**/
@import "./css/aboutaddons/recommendations_category_always_hidden.css"; /**/
@import "./css/aboutaddons/addons_support_always_hidden.css"; /**/

/* @import "./css/aboutpreferences/preferences_alternative_appearance.css"; /**/

@import "./css/aboutpreferences/category_morefrommozilla_hidden.css"; /**/
@import "./css/aboutpreferences/category_nightlyexperiments_hidden.css"; /**/
@import "./css/aboutpreferences/sync_category_always_hidden.css"; /**/
@import "./css/aboutpreferences/firefox_support_always_hidden.css"; /**/

/* @import "./css/aboutlogins/aboutlogins_alternative_appearance.css"; /**/

Append the following lines to the end of the file:

@import "./css/generalui/popup_compact_menus.css";
@import "./css/generalui/popup_compact_menus_squared.css";
@import "./css/generalui/popup_menus_space_before_label.css";
@import "./config/general_variables.css";
@import "./config/color_variables.css";
@import "./css/tabs/tab_context_menuitems_visibility.css";
@import "./css/generalui/send_to_device_menuitems_hidden.css";
@import "./css/generalui/set_as_desktop_background_menuitems_hidden.css";
@import "./css/generalui/findbar_close_at_findbars_start.css";
@import "./css/toolbars/toolbar_context_menuitems_visibility.css";
@import "./css/toolbars/general_toolbar_colors.css";

my_userChrome.css (CSS ver: 4.7.5; Firefox ver: 140–151)

/* @import "./css/additional_menubar_tabstoolbar_adjustments_133.css"; /* Apply one of these two according to your Firefox version. */
@import "./css/additional_menubar_tabstoolbar_adjustments_141.css"; /* Apply one of these two according to your Firefox version. */

:root {
	--urlbarView-small-font-size: 1em !important;
}

menuseparator,
toolbarseparator {
	padding: 0.06em 0 !important;
	margin-left: 0 !important;
	margin-right: 0 !important;
}

tab-split-view-wrapper {
	margin: 0 !important;
	padding: 0 !important;
}

menuitem:not([acceltext]) {
	padding-inline-end: 16px !important;
}

.toolbar-menupopup :is(menu, menuitem) {
	min-height: 24px;
}

[badge="New"]::after {
	display: none !important;
}

.customize-context-moveToPanel,
menu#profiles-menu,
menuitem[id*="highlight"],
toolbarbutton[id$="profiles-button"],
#alltabs-button,
#appMenu-fxa-separator,
#appMenu-new-tab-button2,
#appMenu-translate-button,
#appMenu-whatsnew-button,
#appMenu-zoom-controls,
#bsb-context-add,
#bsb-context-link-add,
#context_addNote,
#context_closeTab,
#context_moveSplitViewToNewGroup,
#context_moveTabToGroup,
#context_moveTabToNewGroup,
#context_MoveTabToOtherWorkspace,
#context_pinSelectedTabs,
#context_pinTab,
#context_reopenInContainer,
#context_shareTabURL,
#context_split_fixedtab,
#context_splittabs,
#context_splitView,
#context_toggleToPrivateContainer,
#context_ungroupSplitView,
#context_ungroupTab,
#context_unloadTab,
#context_unpinSelectedTabs,
#context_unpinTab,
#context_updateNote,
#context-back,
#context-bookmarklink,
#context-bookmarkpage,
#context-forward,
#context-inspect-a11y,
#context-media-pause,
#context-media-play,
#context-openlink,
#context-openlinkincontainertab,
#context-openlinkincurrent,
#context-openlinkinusercontext-menu,
#context-pocket,
#context-print-selection,
#context-reload,
#context-savelinktopocket,
#context-savepage,
#context-searchselect-private,
#context-sendaudio,
#context-sendimage,
#context-sendlinktodevice,
#context-sendpagetodevice,
#context-sendvideo,
#context-sep-copylink,
#context-sep-navigation,
#context-sep-screenshots,
#context-sep-selectall,
#context-sep-sendlinktodevice,
#context-sep-setbackground,
#context-sep-sharing,
#context-stop,
#context-take-screenshot,
#context-translate-selection,
#context-viewsource,
#customize-context-reportExtension,
#import-button,
#menu_newUserContext,
#open_in_private_container,
#splitViewTabContextMenuClose,
#tabContextMenu #context_closeTabOptions,
#tabContextMenu #context_duplicateTabs,
#tabContextMenu #context_openANewTab,
#tabContextMenu #toggle_toolbar-menubar,
#tabContextMenu .share-tab-url-item,
#tabContextMenu [id^="_531906d3-e22f-4a6c-a102-8057b88a1a63_-menuitem"],
#toggle_PersonalToolbar,
#toolbar-context-autohide-downloads-button,
#toolbar-context-bookmarkSelectedTab,
#toolbar-context-bookmarkSelectedTabs,
#toolbar-context-menu #toggle_toolbar-menubar,
#toolbar-context-menu .customize-context-reportExtension,
#toolbar-context-openANewTab,
#toolbar-context-reloadSelectedTab,
#toolbar-context-reloadSelectedTabs,
#toolbar-context-toggle-vertical-tabs,
#_531906d3-e22f-4a6c-a102-8057b88a1a63_-menuitem-_save-selected-links,
[id="placesContext_open:newcontainertab"],
[id^="_74145f27-f039-47ce-a470-a662b129930a_-menu"],
[id^="_81231243-7deb-4d81-bc8a-4a7f3eb62144_-menuitem-_note"],
[id^="maxurl_qsniyg-menuitem"],
[id^="opencc_extension_tnychn-menuitem"],
[id^="placesContext_sortBy"],
menuitem[id*="highlight"] + menuseparator,
#contentAreaContextMenu #context-print-selection + menuseparator,
#context_separateSplitView + menuseparator,
#context_split_fixedtab + menuseparator,
#context_ungroupTab + menuseparator,
#context-bookmarkpage + menuseparator,
#context-searchselect-private + menuseparator,
#context-selectall + menuseparator,
#context-sendlinktodevice + menuseparator,
#context-sendlinktodevice-popup + menuseparator,
#context-setDesktopBackground + menuseparator,
#context-take-screenshot + menuseparator,
#context-translate-selection + menuseparator,
#context-viewimagedesc + menuseparator,
#frame + menuseparator,
#jid1-tfbgelm3d4blkq_jetpack-menuitem-_all-tabs-url-as-list + menuseparator,
#tabContextMenu #context_duplicateTabs + menuseparator,
#tabContextMenu #context_openANewTab + menuseparator,
#tabContextMenu #context_pinTab + menuseparator,
#tabContextMenu #context_selectAllTabs + menuseparator,
#tabContextMenu .share-tab-url-item + menuseparator,
#toggle_PersonalToolbar + menuseparator,
#toggle_toolbar-menubar + menuseparator,
#toolbar-context-menu .customize-context-reportExtension + menuseparator,
#toolbar-context-openANewTab + menuseparator,
#toolbar-context-undoCloseTab + menuseparator {
	visibility: collapse !important;
	display: none !important;
}
#context-inspect + menuseparator {
	display: flex !important;
	box-sizing: border-box !important;
}
#context_separateSplitView + menuseparator {
	display: flex !important;
	box-sizing: border-box !important;
}

.urlbarView-url[overflow] {
	mask-image: none !important;
}
span[class="urlbarView-url"] {
	margin-right: 0.81em !important;
}
#identity-icon-box {
	background-color: rgba(255,255,255,0) !important;
}

#forecastfox_s3_fix_version-BAP {
	padding-right: 0.36em !important;
}

#context_moveTabToSplitView {
	-webkit-box-ordinal-group: -21 !important;
	-moz-box-ordinal-group: -21 !important;
	-box-ordinal-group: -21 !important;
	order: -21 !important;
}
#context_separateSplitView {
	-webkit-box-ordinal-group: -20 !important;
	-moz-box-ordinal-group: -20 !important;
	-box-ordinal-group: -20 !important;
	order: -20 !important;
}
#context-openlinkintab {
	-webkit-box-ordinal-group: -12 !important;
	-moz-box-ordinal-group: -12 !important;
	-box-ordinal-group: -12 !important;
	order: -12 !important;
}
#context-openlinkprivate {
	-webkit-box-ordinal-group: -11 !important;
	-moz-box-ordinal-group: -11 !important;
	-box-ordinal-group: -11 !important;
	order: -11 !important;
}
[id^="copyplaintext_eros_man-menuitem"] {
	-webkit-box-ordinal-group: -10 !important;
	-moz-box-ordinal-group: -10 !important;
	-box-ordinal-group: -10 !important;
	order: -10 !important;
}
[id^="jid1-tfbgelm3d4blkq_jetpack-menuitem"] {
	-webkit-box-ordinal-group: -9 !important;
	-moz-box-ordinal-group: -9 !important;
	-box-ordinal-group: -9 !important;
	order: -9 !important;
}
[id^="_6779b4de-d680-462a-8038-43079e365983_-menuitem"] {
	-webkit-box-ordinal-group: -8 !important;
	-moz-box-ordinal-group: -8 !important;
	-box-ordinal-group: -8 !important;
	order: -8 !important;
}
[id^="highlightedtexttofile_bobbyrne01_org-menuitem"] {
	-webkit-box-ordinal-group: -7 !important;
	-moz-box-ordinal-group: -7 !important;
	-box-ordinal-group: -7 !important;
	order: -7 !important;
}
#contentAreaContextMenu #context-searchselect {
	-webkit-box-ordinal-group: -6 !important;
	-moz-box-ordinal-group: -6 !important;
	-box-ordinal-group: -6 !important;
	order: -6 !important;
}
[id^="context-wiktionary_addons_mozilla_org-menuitem"] {
	-webkit-box-ordinal-group: -5 !important;
	-moz-box-ordinal-group: -5 !important;
	-box-ordinal-group: -5 !important;
	order: -5 !important;
}
[id^="_e040cf12-0537-4265-8ce0-ee195356ed60_-menuitem"] {
	-webkit-box-ordinal-group: -4 !important;
	-moz-box-ordinal-group: -4 !important;
	-box-ordinal-group: -4 !important;
	order: -4 !important;
}

[id^="popupwindow_ettoolong-menuitem"] label {
	-webkit-box-ordinal-group: 1 !important;
	-moz-box-ordinal-group: 1 !important;
	-box-ordinal-group: 1 !important;
	order: 1 !important;
	visibility: collapse !important;
	display: none !important;
}
[id^="popupwindow_ettoolong-menuitem"]::after {
	content: "Pop Out / Remerge";
	display: -moz-box;
}

[id^="copytabtitleurl_bugbugnow_net-menuitem-_menu"] label {
	visibility: collapse !important;
	display: none !important;
}
#copytabtitleurl_bugbugnow_net-menuitem-_menu0::after {
	content: "Both";
	display: -moz-box;
	padding-inline-end: 0.8rem;
}
#copytabtitleurl_bugbugnow_net-menuitem-_menu1::after {
	content: "Title(s) only";
	display: -moz-box;
	padding-inline-end: 0.8rem;
}
#copytabtitleurl_bugbugnow_net-menuitem-_menu2::after {
	content: "URL(s) only";
	display: -moz-box;
	padding-inline-end: 0.8rem;
}

#context-visual-search label {
	visibility: collapse !important;
	display: none !important;
}
#context-visual-search::after {
	content: "Search Image";
	display: -moz-box;
}

#context-openlinkprivate label {
	visibility: collapse !important;
	display: none !important;
}
#context-openlinkprivate::after {
	content: "Open in Private Window";
	display: -moz-box;
}

#context-stripOnShareLink label {
	visibility: collapse !important;
	display: none !important;
}
#context-stripOnShareLink::after {
	content: "Copy Clean Link (U)";
	display: -moz-box;
}

#strip-on-share label {
	visibility: collapse !important;
	display: none !important;
}
#strip-on-share::after {
	content: "Copy Clean (N)";
	display: -moz-box;
}

#_save-url-to-wayback-machine-firefox-addon-menuitem-_archive-url-wayback label {
	visibility: collapse !important;
	display: none !important;
}
#_save-url-to-wayback-machine-firefox-addon-menuitem-_archive-url-wayback::after {
	content: "Wayback Machine";
	display: -moz-box;
	padding-inline-end: 0.8rem;
}
#_save-url-to-wayback-machine-firefox-addon-menuitem-_archive-url-archive label {
	visibility: collapse !important;
	display: none !important;
}
#_save-url-to-wayback-machine-firefox-addon-menuitem-_archive-url-archive::after {
	content: "archive.today";
	display: -moz-box;
	padding-inline-end: 0.8rem;
}
#_save-url-to-wayback-machine-firefox-addon-menuitem-_archive-url-ghost-archive label {
	visibility: collapse !important;
	display: none !important;
}
#_save-url-to-wayback-machine-firefox-addon-menuitem-_archive-url-ghost-archive::after {
	content: "Ghost Archive";
	display: -moz-box;
	padding-inline-end: 0.8rem;
}
#_save-url-to-wayback-machine-firefox-addon-menuitem-_archive-url-both label {
	visibility: collapse !important;
	display: none !important;
}
#_save-url-to-wayback-machine-firefox-addon-menuitem-_archive-url-both::after {
	content: "All above";
	display: -moz-box;
	padding-inline-end: 0.8rem;
}
#_save-url-to-wayback-machine-firefox-addon-menuitem-_archive-image-url-wayback label {
	visibility: collapse !important;
	display: none !important;
}
#_save-url-to-wayback-machine-firefox-addon-menuitem-_archive-image-url-wayback::after {
	content: "Image > Wayback Machine";
	display: -moz-box;
	padding-inline-end: 0.8rem;
}
#_save-url-to-wayback-machine-firefox-addon-menuitem-_archive-link-url-wayback label {
	visibility: collapse !important;
	display: none !important;
}
#_save-url-to-wayback-machine-firefox-addon-menuitem-_archive-link-url-wayback::after {
	content: "Link > Wayback Machine";
	display: -moz-box;
	padding-inline-end: 0.8rem;
}
#_save-url-to-wayback-machine-firefox-addon-menuitem-_archive-image-url-archive label {
	visibility: collapse !important;
	display: none !important;
}
#_save-url-to-wayback-machine-firefox-addon-menuitem-_archive-image-url-archive::after {
	content: "Image > archive.today";
	display: -moz-box;
	padding-inline-end: 0.8rem;
}
#_save-url-to-wayback-machine-firefox-addon-menuitem-_archive-link-url-archive label {
	visibility: collapse !important;
	display: none !important;
}
#_save-url-to-wayback-machine-firefox-addon-menuitem-_archive-link-url-archive::after {
	content: "Link > archive.today";
	display: -moz-box;
	padding-inline-end: 0.8rem;
}
#_save-url-to-wayback-machine-firefox-addon-menuitem-_archive-image-url-ghost-archive label {
	visibility: collapse !important;
	display: none !important;
}
#_save-url-to-wayback-machine-firefox-addon-menuitem-_archive-image-url-ghost-archive::after {
	content: "Image > Ghost Archive";
	display: -moz-box;
	padding-inline-end: 0.8rem;
}
#_save-url-to-wayback-machine-firefox-addon-menuitem-_archive-link-url-ghost-archive label {
	visibility: collapse !important;
	display: none !important;
}
#_save-url-to-wayback-machine-firefox-addon-menuitem-_archive-link-url-ghost-archive::after {
	content: "Link > Ghost Archive";
	display: -moz-box;
	padding-inline-end: 0.8rem;
}
#_save-url-to-wayback-machine-firefox-addon-menuitem-_archive-image-url-both label {
	visibility: collapse !important;
	display: none !important;
}
#_save-url-to-wayback-machine-firefox-addon-menuitem-_archive-image-url-both::after {
	content: "Image > All above";
	display: -moz-box;
	padding-inline-end: 0.8rem;
}
#_save-url-to-wayback-machine-firefox-addon-menuitem-_archive-link-url-both label {
	visibility: collapse !important;
	display: none !important;
}
#_save-url-to-wayback-machine-firefox-addon-menuitem-_archive-link-url-both::after {
	content: "Link > All above";
	display: -moz-box;
	padding-inline-end: 0.8rem;
}

[id^="_ee9507aa-5b54-4548-a8b1-f1840b6d5c26_"] label {
	visibility: collapse !important;
	display: none !important;
}
[id^="_ee9507aa-5b54-4548-a8b1-f1840b6d5c26_"]::after {
	content: "Background Image";
	display: -moz-box;
	padding-inline-end: 0.8rem;
}

[id^="_85b42b8f-49cd-4935-aeca-a6b32dd6ac9f_-menu"] label {
	visibility: collapse !important;
	display: none !important;
}
[id^="_85b42b8f-49cd-4935-aeca-a6b32dd6ac9f_-menu"]::after {
	content: "Open in Popout Player";
	display: -moz-box;
}

#jid1-tfbgelm3d4blkq_jetpack-menuitem-_current-tab label {
	visibility: collapse !important;
	display: none !important;
}
#jid1-tfbgelm3d4blkq_jetpack-menuitem-_current-tab::after {
	content: "Copy as Markdown";
	display: -moz-box;
}
#jid1-tfbgelm3d4blkq_jetpack-menuitem-_selection-as-markdown label {
	visibility: collapse !important;
	display: none !important;
}
#jid1-tfbgelm3d4blkq_jetpack-menuitem-_selection-as-markdown::after {
	content: "Copy as Markdown";
	display: -moz-box;
}

* {
	&, &::before, &::after {
		border-radius: 0 !important;
	}
}

my_userContent.css (CSS ver: 4.7.5; Firefox ver: 140–151)

panel-item + hr {
	visibility: collapse !important;
	display: none !important;
}

menuseparator,
toolbarseparator {
	padding: 0.06em 0 !important;
	margin-left: 0 !important;
	margin-right: 0 !important;
}

@layer tokens-foundation {
	:root, :host(.anonymous-content-host) {
		--border-radius-circle: 0 !important;
		--border-radius-xsmall: 0 !important;
		--border-radius-small: 0 !important;
		--border-radius-medium: 0 !important;
		--border-radius-large: 0 !important;
	}
}

#preferences-root *,
body:has(> div#full) *,
body:has(> div.container) *,
body.aboutPageWideContainer *,
body:has(> div#toolbar) *,
[force-theme] *,
#contentAreaDownloadsView *,
body#lic-info *,
body#body *,
body:has( fxaccounts-button) *,
body:has(> div.ancillary) *,
body.wide-container *,
body:has(> *[data-l10n-id^="about"]) *,
body:has(> p[id^="UI_"]) *,
body:has(> div#app) *,
body:has(> div.container) *,
[focuseddatatype] *,
body.theme-body *,
body:has(> p.showNormal) *,
#moz-toggle-button {
	&, &::before, &::after {
		border-radius: 0 !important;
	}
}

Firefox CSS Modification (from 140 onwards)

Modifications of CustomCSSforFx’s Original CSS Files

Additional File Placement(s)

userChrome.css & userContent.css Modifications and Additions

导航菜单

搜索