diff --git a/chrome/normal_pinned_tabs.css b/chrome/normal_pinned_tabs.css
index b996a97..add8871 100644
--- a/chrome/normal_pinned_tabs.css
+++ b/chrome/normal_pinned_tabs.css
@@ -24,7 +24,7 @@ See the above repository for updates as well as full license text. */
 .tab-label-container{ width: unset !important; }
 .tab-label-container[pinned]{ margin-inline-start: 8px }
 
-.tab-icon-sound:-moz-any([soundplaying],[muted],[activemedia-blocked],[pictureinpicture]),
+.tab-icon-sound:is([soundplaying],[muted],[activemedia-blocked],[pictureinpicture]),
 .tab-close-button{ display: -moz-box !important; }
 .tab-icon-overlay{ display: none !important; }
 
diff --git a/chrome/tab_loading_progress_throbber.css b/chrome/tab_loading_progress_throbber.css
index 903d54b..c2dfa02 100644
--- a/chrome/tab_loading_progress_throbber.css
+++ b/chrome/tab_loading_progress_throbber.css
@@ -19,7 +19,7 @@ See the above repository for updates as well as full license text. */
   clip-path: polygon(50% 50%,50% 0%,50% 0%,50% 0%, 50% 0%,50% 0%, 50% 0%);
   transition: clip-path 0.2s ease-out, opacity 0.3s linear 0.1s;
 }
-.tabbrowser-tab:-moz-any([busy],[bursting]) .tab-content{ padding-left: calc( 9px - (var(--tab-loader-size) - 16px)) !important; }
+.tabbrowser-tab:is([busy],[bursting]) .tab-content{ padding-left: calc( 9px - (var(--tab-loader-size) - 16px)) !important; }
 .tabbrowser-tab[pinned] .tab-content::before{ margin-right: 0px }
 @keyframes loadprogress{
   from{ clip-path: polygon(50% 50%,50% 0%,100% 0%,100% 50%, 100% 50%,100% 50%, 100% 50%); }
diff --git a/chrome/toolbars_below_content.css b/chrome/toolbars_below_content.css
index 2dfe62f..b1b62c4 100644
--- a/chrome/toolbars_below_content.css
+++ b/chrome/toolbars_below_content.css
@@ -10,7 +10,7 @@ See the above repository for updates as well as full license text. */
   #titlebar{ -moz-appearance: none !important; }
 
   @media (-moz-os-version: windows-win10){
-    :root[sizemode="maximized"][tabsintitlebar] :-moz-any(#browser,#customization-container,#toolbar-menubar){ margin-top: 8px !important; }
+    :root[sizemode="maximized"][tabsintitlebar] :is(#browser,#customization-container,#toolbar-menubar){ margin-top: 8px !important; }
   }
 
   #mainPopupSet,
diff --git a/chrome/vertical_popup_menubar.css b/chrome/vertical_popup_menubar.css
index 30fdf91..6fb76fd 100644
--- a/chrome/vertical_popup_menubar.css
+++ b/chrome/vertical_popup_menubar.css
@@ -32,7 +32,7 @@ menubar > menu > menupopup{ margin: calc(0px - var(--uc-menubaritem-height)) 0 0
 
 #toolbar-menubar[autohide="true"]:not([inactive]){ margin-bottom: -32px }
 
-#toolbar-menubar > .titlebar-buttonbox-container + :-moz-any(toolbarbutton,toolbaritem){ margin-inline-start: var(--uc-menubaritem-width) }
+#toolbar-menubar > .titlebar-buttonbox-container + :is(toolbarbutton,toolbaritem){ margin-inline-start: var(--uc-menubaritem-width) }
 
 #file-menu{
   fill: currentColor;