diff --git a/Userland/Libraries/LibWeb/CSS/Identifiers.json b/Userland/Libraries/LibWeb/CSS/Identifiers.json
index 81c09ca0d0..058cdaa5d8 100644
--- a/Userland/Libraries/LibWeb/CSS/Identifiers.json
+++ b/Userland/Libraries/LibWeb/CSS/Identifiers.json
@@ -75,6 +75,7 @@
   "center",
   "circle",
   "clip",
+  "coarse",
   "col-resize",
   "collapse",
   "column",
@@ -97,6 +98,8 @@
   "e-resize",
   "ew-resize",
   "fantasy",
+  "fast",
+  "fine",
   "fixed",
   "flex",
   "flex-start",
@@ -109,14 +112,18 @@
   "groove",
   "help",
   "hidden",
+  "hover",
+  "infinite",
   "inline",
   "inline-block",
   "inline-table",
   "inset",
   "inside",
+  "interlace",
   "invert",
   "italic",
   "justify",
+  "landscape",
   "large",
   "larger",
   "left",
@@ -149,11 +156,16 @@
   "outset",
   "outside",
   "overline",
+  "p3",
+  "paged",
   "pointer",
+  "portrait",
   "pre",
   "pre-line",
   "pre-wrap",
   "progress",
+  "progressive",
+  "rec2020",
   "relative",
   "repeat",
   "repeat-x",
@@ -170,6 +182,8 @@
   "se-resize",
   "separate",
   "serif",
+  "srgb",
+  "slow",
   "small",
   "small-caps",
   "smaller",