diff --git a/browser/locales/en-US/chrome/browser/devtools/profiler.dtd b/browser/locales/en-US/chrome/browser/devtools/profiler.dtd
index 3f505707b4d0..43a768dfb0b9 100644
--- a/browser/locales/en-US/chrome/browser/devtools/profiler.dtd
+++ b/browser/locales/en-US/chrome/browser/devtools/profiler.dtd
@@ -10,18 +10,6 @@
   - A good criteria is the language in which you'd find the best
   - documentation on web development on the web. -->
 
-<!-- LOCALIZATION NOTE (profilerNew.label): This is the label for the
-  -  button that creates a new profile. -->
-<!ENTITY profilerNew.label "New">
-
-<!-- LOCALIZATION NOTE (profilerStart.label): This is the label for the
-  -  button that starts the profiler. -->
-<!ENTITY profilerStart.label "Start">
-
-<!-- LOCALIZATION NOTE (profilerStop.label): This is the label for the
-  -  button that stops the profiler. -->
-<!ENTITY profilerStop.label "Stop">
-
 <!-- LOCALIZATION NOTE (profiler.importProfile): This string is displayed
   -  on a button that opens a dialog to import a saved profile data file. -->
 <!ENTITY importProfile.label "Import…">
\ No newline at end of file
diff --git a/browser/locales/en-US/chrome/browser/devtools/profiler.properties b/browser/locales/en-US/chrome/browser/devtools/profiler.properties
index bc89c6e2d172..9f48ff04c513 100644
--- a/browser/locales/en-US/chrome/browser/devtools/profiler.properties
+++ b/browser/locales/en-US/chrome/browser/devtools/profiler.properties
@@ -55,16 +55,6 @@ profiler.self=Self
 # This string is displayed as a table header in the profiler UI.
 profiler.symbolName=Symbol Name
 
-# LOCALIZATION NOTE (profiler.startProfiling)
-# This string is displayed around the button that starts the profiler.
-# String argument will be replaced with a Start button.
-profiler.startProfiling=Click here %S to start profiling
-
-# LOCALIZATION NOTE (profiler.stopProfiling)
-# This string is displayed around the button that stops the profiler.
-# String argument will be replaced with a Stop button.
-profiler.stopProfiling = Click here %S to stop profiling
-
 # LOCALIZATION NOTE (profiler.start)
 # This string is displayed on the button that starts the profiler.
 profiler.start=Start
@@ -78,11 +68,6 @@ profiler.stop=Stop
 # is busy loading and parsing the report.
 profiler.loading=Loading profile…
 
-# LOCALIZATION NOTE (profiler.alreadyRunning)
-# This string is displayed in the profiler whenever there is already
-# another running profile. Users can run only one profile at a time.
-profiler.alreadyRunning=Profiler is already running. If you want to run this profile stop Profile %S first.
-
 # LOCALIZATION NOTE (profiler.stateIdle)
 # This string is used to show that the profile in question is in IDLE
 # state meaning that it hasn't been started yet.