diff --git a/gfx/layers/layerviewer/index.html b/gfx/layers/layerviewer/index.html
index 000e40b8bde918fa69d6a1ba939e79aa633d8986..767e15042d53ebf2b731a880fce74cbf8697dc80 100644
--- a/gfx/layers/layerviewer/index.html
+++ b/gfx/layers/layerviewer/index.html
@@ -39,7 +39,7 @@ ClientLayerManager (0x1264f5000)
     <input type="button" value="Process pasted log" onclick="log_pasted()" />
     <br>
     <br>
-    Help: To get a layers dump go to about:config and set layout.display-list.dump;true or layers.dump;true.
+    Help: To get a layers dump go to about:config and set layout.display-list.dump;true
     <script>
 function log_pasted() {
   var container = parseMultiLineDump(document.getElementById("input_layers_dump").value);
diff --git a/modules/libpref/init/StaticPrefList.yaml b/modules/libpref/init/StaticPrefList.yaml
index 4eabc6ee7df935de3dd2e7358c99e8141d859ab1..49e420eb150c9a338197aec5c6b22d19cf923f59 100644
--- a/modules/libpref/init/StaticPrefList.yaml
+++ b/modules/libpref/init/StaticPrefList.yaml
@@ -6350,34 +6350,6 @@
 #endif
   mirror: always
 
-- name: layers.dump
-  type: RelaxedAtomicBool
-  value: false
-  mirror: always
-
-# If we're dumping layers, also dump the texture data
-- name: layers.dump-texture
-  type: RelaxedAtomicBool
-  value: false
-  mirror: always
-
-#ifdef MOZ_DUMP_PAINTING
--   name: layers.dump-decision
-    type: RelaxedAtomicBool
-    value: false
-    mirror: always
-#endif
-
-- name: layers.dump-client-layers
-  type: RelaxedAtomicBool
-  value: false
-  mirror: always
-
-- name: layers.dump-host-layers
-  type: RelaxedAtomicBool
-  value: false
-  mirror: always
-
 - name: layers.enable-tiles
   type: bool
 #if defined(XP_MACOSX) || defined (XP_OPENBSD)