diff --git a/devtools/client/locales/en-US/startup.properties b/devtools/client/locales/en-US/startup.properties
index 0ba66473b931..ba01160e6fdc 100644
--- a/devtools/client/locales/en-US/startup.properties
+++ b/devtools/client/locales/en-US/startup.properties
@@ -98,20 +98,6 @@ ToolboxStyleEditor.tooltip3=Stylesheet Editor (CSS) (%S)
 # editor.
 open.accesskey=l
 
-# LOCALIZATION NOTE (ToolboxWebAudioEditor1.label):
-# This string is displayed in the title of the tab when the Web Audio Editor
-# is displayed inside the developer tools window and in the Developer Tools Menu.
-ToolboxWebAudioEditor1.label=Web Audio
-
-# LOCALIZATION NOTE (ToolboxWebAudioEditor1.panelLabel):
-# This is used as the label for the toolbox panel.
-ToolboxWebAudioEditor1.panelLabel=Web Audio Panel
-
-# LOCALIZATION NOTE (ToolboxWebAudioEditor1.tooltip):
-# This string is displayed in the tooltip of the tab when the Web Audio Editor is
-# displayed inside the developer tools window.
-ToolboxWebAudioEditor1.tooltip=Web Audio context visualizer and audio node inspector
-
 # LOCALIZATION NOTE (inspector.*)
 # Used for the menuitem in the tool menu
 inspector.label=Inspector
diff --git a/devtools/client/shared/telemetry.js b/devtools/client/shared/telemetry.js
index 39607bc6e47d..68510fa13f63 100644
--- a/devtools/client/shared/telemetry.js
+++ b/devtools/client/shared/telemetry.js
@@ -706,7 +706,6 @@ function getChartsFromToolId(id) {
     case "STORAGE":
     case "STYLEEDITOR":
     case "TOOLBOX":
-    case "WEBAUDIOEDITOR":
     case "WEBCONSOLE":
     case "WEBIDE":
       timerHist = `DEVTOOLS_${id}_TIME_ACTIVE_SECONDS`;