diff --git a/build_overrides/README.md b/build_overrides/README.md
index cc0efbf..69a38d4 100644
--- a/build_overrides/README.md
+++ b/build_overrides/README.md
@@ -16,7 +16,7 @@
 `build_standalone_d8 = false`.
 
 The two files should define the same set of variables, but the values may
-vary as appropriate to suit the the needs of the two different builds.
+vary as appropriate to suit the needs of the two different builds.
 
 The build.gni file provides a way for projects to override defaults for
 variables used in //build itself (which we want to be shareable between
diff --git a/core/fxcrt/string_view_template.h b/core/fxcrt/string_view_template.h
index cd3614b..1e436d3 100644
--- a/core/fxcrt/string_view_template.h
+++ b/core/fxcrt/string_view_template.h
@@ -50,7 +50,7 @@
       : m_Ptr(ptr), m_Length(size) {}
 
   // Deliberately implicit to avoid calling on every string literal.
-  // |ch| must be an lvalue that outlives the the StringViewTemplate.
+  // |ch| must be an lvalue that outlives the StringViewTemplate.
   // NOLINTNEXTLINE(runtime/explicit)
   StringViewTemplate(CharType& ch) {
     m_Ptr = reinterpret_cast<const UnsignedType*>(&ch);
diff --git a/fxjs/README b/fxjs/README
index 99d2f90..adc5827 100644
--- a/fxjs/README
+++ b/fxjs/README
@@ -11,7 +11,7 @@
 FXJS binds objects by sticking a pointer to a CFXJS_PerObjectData in
 the V8 object's internal slot.  FXJSE binds objects by sticking a
 pointer to either an actual v8 function object or a CFXJSE_HostObject
-in the the V8 object's internal slot, depending upon whether the object
+in the V8 object's internal slot, depending upon whether the object
 represents (in some notion) a "class" or an "instance". Also, V8 objects
 bound in one library may unexpectedly arrive at the other given a script
 that's trying to mess with us.
diff --git a/testing/tools/safetynet_compare.py b/testing/tools/safetynet_compare.py
index ce0505f..0cf1aec 100755
--- a/testing/tools/safetynet_compare.py
+++ b/testing/tools/safetynet_compare.py
@@ -137,7 +137,7 @@
 
     Returns:
       A tuple (before, after), where each of before and after is a dict
-      mapping a test case name to the the profiling values for that test case
+      mapping a test case name to the profiling values for that test case
       in the given branch.
     """
     branch_to_restore = self.git.GetCurrentBranchName()
@@ -172,7 +172,7 @@
 
     Returns:
       A tuple (before, after), where each of before and after is a dict
-      mapping a test case name to the the profiling values for that test case
+      mapping a test case name to the profiling values for that test case
       in the given branch.
     """
     after = self._ProfileSeparateRepo('after',
@@ -196,7 +196,7 @@
 
     Returns:
       A tuple (before, after), where each of before and after is a dict
-      mapping a test case name to the the profiling values for that test case
+      mapping a test case name to the profiling values for that test case
       in the given branch. The current branch is considered to be "after" and
       the other branch is considered to be "before".
     """
@@ -230,7 +230,7 @@
 
     Returns:
       A tuple (before, after), where each of before and after is a dict
-      mapping a test case name to the the profiling values for that test case
+      mapping a test case name to the profiling values for that test case
       in the given branch. The current branch is considered to be "after" and
       the other branch is considered to be "before".
     """
@@ -251,7 +251,7 @@
 
     Returns:
       A tuple (before, after), where each of before and after is a dict
-      mapping a test case name to the the profiling values for that test case
+      mapping a test case name to the profiling values for that test case
       using the given version. The current branch without uncommitted changes is
       considered to be "before" and with uncommitted changes is considered to be
       "after".
@@ -280,7 +280,7 @@
 
     Returns:
       A tuple (before, after), where each of before and after is a dict
-      mapping a test case name to the the profiling values for that test case
+      mapping a test case name to the profiling values for that test case
       using the given version. The current branch without uncommitted changes is
       considered to be "before" and with uncommitted changes is considered to be
       "after".
@@ -298,7 +298,7 @@
       branch: Branch to checkout in the new repository. None will
           profile the same branch checked out in the original repo.
     Returns:
-      A dict mapping each test case name to the the profiling values for that
+      A dict mapping each test case name to the profiling values for that
       test case.
     """
     build_dir = self._CreateTempRepo('repo_%s' % run_label,
@@ -408,7 +408,7 @@
       build_dir: String with path to build directory
 
     Returns:
-      A dict mapping each test case name to the the profiling values for that
+      A dict mapping each test case name to the profiling values for that
       test case.
     """
     results = {}
@@ -431,7 +431,7 @@
       build_dir: String with path to build directory
 
     Returns:
-      A dict mapping each test case name to the the profiling values for that
+      A dict mapping each test case name to the profiling values for that
       test case.
     """
     results = {}
@@ -509,10 +509,10 @@
     """Draws conclusions comparing results of test runs in two branches.
 
     Args:
-      times_before_branch: A dict mapping each test case name to the the
+      times_before_branch: A dict mapping each test case name to the
           profiling values for that test case in the branch to be considered
           as the baseline.
-      times_after_branch: A dict mapping each test case name to the the
+      times_after_branch: A dict mapping each test case name to the
           profiling values for that test case in the branch to be considered
           as the new version.