diff --git a/components/profile/time.rs b/components/profile/time.rs
index 9aaa4ef0023..35f3ea65a47 100644
--- a/components/profile/time.rs
+++ b/components/profile/time.rs
@@ -76,19 +76,12 @@ impl Formattable for ProfilerCategory {
         let padding = match *self {
             ProfilerCategory::LayoutStyleRecalc |
             ProfilerCategory::LayoutRestyleDamagePropagation |
-            ProfilerCategory::LayoutNonIncrementalReset |
             ProfilerCategory::LayoutGeneratedContent |
-            ProfilerCategory::LayoutDisplayListSorting |
             ProfilerCategory::LayoutFloatPlacementSpeculation |
             ProfilerCategory::LayoutMain |
             ProfilerCategory::LayoutStoreOverflow |
             ProfilerCategory::LayoutDispListBuild |
-            ProfilerCategory::LayoutDamagePropagate |
-            ProfilerCategory::PaintingPerTile |
-            ProfilerCategory::PaintingPrepBuff => "+ ",
             ProfilerCategory::LayoutParallelWarmup |
-            ProfilerCategory::LayoutSelectorMatch |
-            ProfilerCategory::LayoutTreeBuilder |
             ProfilerCategory::LayoutTextShaping => "| + ",
             _ => "",
         };
@@ -98,22 +91,12 @@ impl Formattable for ProfilerCategory {
             ProfilerCategory::LayoutStyleRecalc => "Style Recalc",
             ProfilerCategory::LayoutTextShaping => "Text Shaping",
             ProfilerCategory::LayoutRestyleDamagePropagation => "Restyle Damage Propagation",
-            ProfilerCategory::LayoutNonIncrementalReset => "Non-incremental reset (temporary)",
-            ProfilerCategory::LayoutSelectorMatch => "Selector Matching",
-            ProfilerCategory::LayoutTreeBuilder => "Tree Building",
-            ProfilerCategory::LayoutDamagePropagate => "Damage Propagation",
-            ProfilerCategory::LayoutDisplayListSorting => "Sorting Display List",
             ProfilerCategory::LayoutGeneratedContent => "Generated Content Resolution",
             ProfilerCategory::LayoutFloatPlacementSpeculation => "Float Placement Speculation",
             ProfilerCategory::LayoutMain => "Primary Layout Pass",
             ProfilerCategory::LayoutStoreOverflow => "Store Overflow",
             ProfilerCategory::LayoutParallelWarmup => "Parallel Warmup",
             ProfilerCategory::LayoutDispListBuild => "Display List Construction",
-            ProfilerCategory::NetHTTPRequestResponse => "Network HTTP Request/Response",
-            ProfilerCategory::PaintingPerTile => "Painting Per Tile",
-            ProfilerCategory::PaintingPrepBuff => "Buffer Prep",
-            ProfilerCategory::Painting => "Painting",
-            ProfilerCategory::ImageDecoding => "Image Decoding",
             ProfilerCategory::ImageSaving => "Image Saving",
             ProfilerCategory::ScriptAttachLayout => "Script Attach Layout",
             ProfilerCategory::ScriptConstellationMsg => "Script Constellation Msg",
@@ -142,7 +125,6 @@ impl Formattable for ProfilerCategory {
             ProfilerCategory::ScriptServiceWorkerEvent => "Script Service Worker Event",
             ProfilerCategory::ScriptEnterFullscreen => "Script Enter Fullscreen",
             ProfilerCategory::ScriptExitFullscreen => "Script Exit Fullscreen",
-            ProfilerCategory::ScriptWebVREvent => "Script WebVR Event",
             ProfilerCategory::ScriptWorkletEvent => "Script Worklet Event",
             ProfilerCategory::ScriptPerformanceEvent => "Script Performance Event",
             ProfilerCategory::ScriptWebGPUMsg => "Script WebGPU Message",
diff --git a/components/shared/profile/time.rs b/components/shared/profile/time.rs
index ec3b1a734d9..f30ee4a323d 100644
--- a/components/shared/profile/time.rs
+++ b/components/shared/profile/time.rs
@@ -60,25 +60,18 @@ pub enum ProfilerMsg {
 pub enum ProfilerCategory {
     Compositing = 0x00,
     LayoutPerform = 0x10,
+
+    /// Events currently only used by Layout 2013.
     LayoutStyleRecalc = 0x11,
     LayoutTextShaping = 0x12,
     LayoutRestyleDamagePropagation = 0x13,
-    LayoutNonIncrementalReset = 0x14,
-    LayoutSelectorMatch = 0x15,
-    LayoutTreeBuilder = 0x16,
-    LayoutDamagePropagate = 0x17,
     LayoutGeneratedContent = 0x18,
-    LayoutDisplayListSorting = 0x19,
     LayoutFloatPlacementSpeculation = 0x1a,
     LayoutMain = 0x1b,
     LayoutStoreOverflow = 0x1c,
     LayoutParallelWarmup = 0x1d,
     LayoutDispListBuild = 0x1e,
-    NetHTTPRequestResponse = 0x30,
-    PaintingPerTile = 0x41,
-    PaintingPrepBuff = 0x42,
-    Painting = 0x43,
-    ImageDecoding = 0x50,
+
     ImageSaving = 0x51,
     ScriptAttachLayout = 0x60,
     ScriptConstellationMsg = 0x61,
@@ -111,15 +104,17 @@ pub enum ProfilerCategory {
 
     ScriptEnterFullscreen = 0x77,
     ScriptExitFullscreen = 0x78,
-    ScriptWebVREvent = 0x79,
     ScriptWorkletEvent = 0x7a,
     ScriptPerformanceEvent = 0x7b,
     ScriptHistoryEvent = 0x7c,
     ScriptPortMessage = 0x7d,
     ScriptWebGPUMsg = 0x7e,
+
+    /// Web performance metrics.
     TimeToFirstPaint = 0x80,
     TimeToFirstContentfulPaint = 0x81,
     TimeToInteractive = 0x82,
+
     IpcReceiver = 0x83,
     IpcBytesReceiver = 0x84,
 }
@@ -132,22 +127,12 @@ impl ProfilerCategory {
             ProfilerCategory::LayoutStyleRecalc => "LayoutStyleRecalc",
             ProfilerCategory::LayoutTextShaping => "LayoutTextShaping",
             ProfilerCategory::LayoutRestyleDamagePropagation => "LayoutRestyleDamagePropagation",
-            ProfilerCategory::LayoutNonIncrementalReset => "LayoutNonIncrementalReset",
-            ProfilerCategory::LayoutSelectorMatch => "LayoutSelectorMatch",
-            ProfilerCategory::LayoutTreeBuilder => "LayoutTreeBuilder",
-            ProfilerCategory::LayoutDamagePropagate => "LayoutDamagePropagate",
             ProfilerCategory::LayoutGeneratedContent => "LayoutGeneratedContent",
-            ProfilerCategory::LayoutDisplayListSorting => "LayoutDisplayListSorting",
             ProfilerCategory::LayoutFloatPlacementSpeculation => "LayoutFloatPlacementSpeculation",
             ProfilerCategory::LayoutMain => "LayoutMain",
             ProfilerCategory::LayoutStoreOverflow => "LayoutStoreOverflow",
             ProfilerCategory::LayoutParallelWarmup => "LayoutParallelWarmup",
             ProfilerCategory::LayoutDispListBuild => "LayoutDispListBuild",
-            ProfilerCategory::NetHTTPRequestResponse => "NetHTTPRequestResponse",
-            ProfilerCategory::PaintingPerTile => "PaintingPerTile",
-            ProfilerCategory::PaintingPrepBuff => "PaintingPrepBuff",
-            ProfilerCategory::Painting => "Painting",
-            ProfilerCategory::ImageDecoding => "ImageDecoding",
             ProfilerCategory::ImageSaving => "ImageSaving",
             ProfilerCategory::ScriptAttachLayout => "ScriptAttachLayout",
             ProfilerCategory::ScriptConstellationMsg => "ScriptConstellationMsg",
@@ -174,7 +159,6 @@ impl ProfilerCategory {
             ProfilerCategory::ScriptParseXML => "ScriptParseXML",
             ProfilerCategory::ScriptEnterFullscreen => "ScriptEnterFullscreen",
             ProfilerCategory::ScriptExitFullscreen => "ScriptExitFullscreen",
-            ProfilerCategory::ScriptWebVREvent => "ScriptWebVREvent",
             ProfilerCategory::ScriptWorkletEvent => "ScriptWorkletEvent",
             ProfilerCategory::ScriptPerformanceEvent => "ScriptPerformanceEvent",
             ProfilerCategory::ScriptHistoryEvent => "ScriptHistoryEvent",