diff --git a/schemas/telemetry/bhr/bhr.4.schema.json b/schemas/telemetry/bhr/bhr.4.schema.json
index 8a7f7c6ed..315d89bf0 100644
--- a/schemas/telemetry/bhr/bhr.4.schema.json
+++ b/schemas/telemetry/bhr/bhr.4.schema.json
@@ -1148,6 +1148,14 @@
                 "monitors": {
                   "items": {
                     "properties": {
+                      "contentsScaleFactor": {
+                        "description": "The number of device pixels per desktop pixel for this screen.",
+                        "type": "number"
+                      },
+                      "defaultCSSScaleFactor": {
+                        "description": "The default number of device pixels per unscaled CSS pixel for this screen.",
+                        "type": "number"
+                      },
                       "pseudoDisplay": {
                         "type": "boolean"
                       },
@@ -1167,6 +1175,10 @@
                     "type": "object"
                   },
                   "type": "array"
+                },
+                "textScaleFactor": {
+                  "description": "Text scale supported by GTK and Windows. 1 corresponds to 100%.",
+                  "type": "number"
                 }
               },
               "type": "object"
diff --git a/schemas/telemetry/crash/crash.4.schema.json b/schemas/telemetry/crash/crash.4.schema.json
index c90a5659f..35a7c29d2 100644
--- a/schemas/telemetry/crash/crash.4.schema.json
+++ b/schemas/telemetry/crash/crash.4.schema.json
@@ -1147,6 +1147,14 @@
                 "monitors": {
                   "items": {
                     "properties": {
+                      "contentsScaleFactor": {
+                        "description": "The number of device pixels per desktop pixel for this screen.",
+                        "type": "number"
+                      },
+                      "defaultCSSScaleFactor": {
+                        "description": "The default number of device pixels per unscaled CSS pixel for this screen.",
+                        "type": "number"
+                      },
                       "pseudoDisplay": {
                         "type": "boolean"
                       },
@@ -1166,6 +1174,10 @@
                     "type": "object"
                   },
                   "type": "array"
+                },
+                "textScaleFactor": {
+                  "description": "Text scale supported by GTK and Windows. 1 corresponds to 100%.",
+                  "type": "number"
                 }
               },
               "type": "object"
diff --git a/schemas/telemetry/dnssec-study-v1/dnssec-study-v1.4.schema.json b/schemas/telemetry/dnssec-study-v1/dnssec-study-v1.4.schema.json
index cef6f3085..424aae73b 100644
--- a/schemas/telemetry/dnssec-study-v1/dnssec-study-v1.4.schema.json
+++ b/schemas/telemetry/dnssec-study-v1/dnssec-study-v1.4.schema.json
@@ -1147,6 +1147,14 @@
                 "monitors": {
                   "items": {
                     "properties": {
+                      "contentsScaleFactor": {
+                        "description": "The number of device pixels per desktop pixel for this screen.",
+                        "type": "number"
+                      },
+                      "defaultCSSScaleFactor": {
+                        "description": "The default number of device pixels per unscaled CSS pixel for this screen.",
+                        "type": "number"
+                      },
                       "pseudoDisplay": {
                         "type": "boolean"
                       },
@@ -1166,6 +1174,10 @@
                     "type": "object"
                   },
                   "type": "array"
+                },
+                "textScaleFactor": {
+                  "description": "Text scale supported by GTK and Windows. 1 corresponds to 100%.",
+                  "type": "number"
                 }
               },
               "type": "object"
diff --git a/schemas/telemetry/event/event.4.schema.json b/schemas/telemetry/event/event.4.schema.json
index 2ebb638ce..c15427b73 100644
--- a/schemas/telemetry/event/event.4.schema.json
+++ b/schemas/telemetry/event/event.4.schema.json
@@ -1147,6 +1147,14 @@
                 "monitors": {
                   "items": {
                     "properties": {
+                      "contentsScaleFactor": {
+                        "description": "The number of device pixels per desktop pixel for this screen.",
+                        "type": "number"
+                      },
+                      "defaultCSSScaleFactor": {
+                        "description": "The default number of device pixels per unscaled CSS pixel for this screen.",
+                        "type": "number"
+                      },
                       "pseudoDisplay": {
                         "type": "boolean"
                       },
@@ -1166,6 +1174,10 @@
                     "type": "object"
                   },
                   "type": "array"
+                },
+                "textScaleFactor": {
+                  "description": "Text scale supported by GTK and Windows. 1 corresponds to 100%.",
+                  "type": "number"
                 }
               },
               "type": "object"
diff --git a/schemas/telemetry/first-shutdown/first-shutdown.4.schema.json b/schemas/telemetry/first-shutdown/first-shutdown.4.schema.json
index 1aee91973..1fef744ed 100644
--- a/schemas/telemetry/first-shutdown/first-shutdown.4.schema.json
+++ b/schemas/telemetry/first-shutdown/first-shutdown.4.schema.json
@@ -1161,6 +1161,14 @@
                 "monitors": {
                   "items": {
                     "properties": {
+                      "contentsScaleFactor": {
+                        "description": "The number of device pixels per desktop pixel for this screen.",
+                        "type": "number"
+                      },
+                      "defaultCSSScaleFactor": {
+                        "description": "The default number of device pixels per unscaled CSS pixel for this screen.",
+                        "type": "number"
+                      },
                       "pseudoDisplay": {
                         "type": "boolean"
                       },
@@ -1180,6 +1188,10 @@
                     "type": "object"
                   },
                   "type": "array"
+                },
+                "textScaleFactor": {
+                  "description": "Text scale supported by GTK and Windows. 1 corresponds to 100%.",
+                  "type": "number"
                 }
               },
               "type": "object"
diff --git a/schemas/telemetry/heartbeat/heartbeat.4.schema.json b/schemas/telemetry/heartbeat/heartbeat.4.schema.json
index 5421d0337..b2f7d1838 100644
--- a/schemas/telemetry/heartbeat/heartbeat.4.schema.json
+++ b/schemas/telemetry/heartbeat/heartbeat.4.schema.json
@@ -1155,6 +1155,14 @@
                 "monitors": {
                   "items": {
                     "properties": {
+                      "contentsScaleFactor": {
+                        "description": "The number of device pixels per desktop pixel for this screen.",
+                        "type": "number"
+                      },
+                      "defaultCSSScaleFactor": {
+                        "description": "The default number of device pixels per unscaled CSS pixel for this screen.",
+                        "type": "number"
+                      },
                       "pseudoDisplay": {
                         "type": "boolean"
                       },
@@ -1174,6 +1182,10 @@
                     "type": "object"
                   },
                   "type": "array"
+                },
+                "textScaleFactor": {
+                  "description": "Text scale supported by GTK and Windows. 1 corresponds to 100%.",
+                  "type": "number"
                 }
               },
               "type": "object"
diff --git a/schemas/telemetry/main/main.4.schema.json b/schemas/telemetry/main/main.4.schema.json
index f7b9d8c80..32569991c 100644
--- a/schemas/telemetry/main/main.4.schema.json
+++ b/schemas/telemetry/main/main.4.schema.json
@@ -1161,6 +1161,14 @@
                 "monitors": {
                   "items": {
                     "properties": {
+                      "contentsScaleFactor": {
+                        "description": "The number of device pixels per desktop pixel for this screen.",
+                        "type": "number"
+                      },
+                      "defaultCSSScaleFactor": {
+                        "description": "The default number of device pixels per unscaled CSS pixel for this screen.",
+                        "type": "number"
+                      },
                       "pseudoDisplay": {
                         "type": "boolean"
                       },
@@ -1180,6 +1188,10 @@
                     "type": "object"
                   },
                   "type": "array"
+                },
+                "textScaleFactor": {
+                  "description": "Text scale supported by GTK and Windows. 1 corresponds to 100%.",
+                  "type": "number"
                 }
               },
               "type": "object"
diff --git a/schemas/telemetry/modules/modules.4.schema.json b/schemas/telemetry/modules/modules.4.schema.json
index 98830f8df..0a6045a71 100644
--- a/schemas/telemetry/modules/modules.4.schema.json
+++ b/schemas/telemetry/modules/modules.4.schema.json
@@ -1147,6 +1147,14 @@
                 "monitors": {
                   "items": {
                     "properties": {
+                      "contentsScaleFactor": {
+                        "description": "The number of device pixels per desktop pixel for this screen.",
+                        "type": "number"
+                      },
+                      "defaultCSSScaleFactor": {
+                        "description": "The default number of device pixels per unscaled CSS pixel for this screen.",
+                        "type": "number"
+                      },
                       "pseudoDisplay": {
                         "type": "boolean"
                       },
@@ -1166,6 +1174,10 @@
                     "type": "object"
                   },
                   "type": "array"
+                },
+                "textScaleFactor": {
+                  "description": "Text scale supported by GTK and Windows. 1 corresponds to 100%.",
+                  "type": "number"
                 }
               },
               "type": "object"
diff --git a/schemas/telemetry/new-profile/new-profile.4.schema.json b/schemas/telemetry/new-profile/new-profile.4.schema.json
index e117778c6..682e0a251 100644
--- a/schemas/telemetry/new-profile/new-profile.4.schema.json
+++ b/schemas/telemetry/new-profile/new-profile.4.schema.json
@@ -1147,6 +1147,14 @@
                 "monitors": {
                   "items": {
                     "properties": {
+                      "contentsScaleFactor": {
+                        "description": "The number of device pixels per desktop pixel for this screen.",
+                        "type": "number"
+                      },
+                      "defaultCSSScaleFactor": {
+                        "description": "The default number of device pixels per unscaled CSS pixel for this screen.",
+                        "type": "number"
+                      },
                       "pseudoDisplay": {
                         "type": "boolean"
                       },
@@ -1166,6 +1174,10 @@
                     "type": "object"
                   },
                   "type": "array"
+                },
+                "textScaleFactor": {
+                  "description": "Text scale supported by GTK and Windows. 1 corresponds to 100%.",
+                  "type": "number"
                 }
               },
               "type": "object"
diff --git a/schemas/telemetry/saved-session/saved-session.4.schema.json b/schemas/telemetry/saved-session/saved-session.4.schema.json
index 2f13b6756..9d57bbf54 100644
--- a/schemas/telemetry/saved-session/saved-session.4.schema.json
+++ b/schemas/telemetry/saved-session/saved-session.4.schema.json
@@ -1161,6 +1161,14 @@
                 "monitors": {
                   "items": {
                     "properties": {
+                      "contentsScaleFactor": {
+                        "description": "The number of device pixels per desktop pixel for this screen.",
+                        "type": "number"
+                      },
+                      "defaultCSSScaleFactor": {
+                        "description": "The default number of device pixels per unscaled CSS pixel for this screen.",
+                        "type": "number"
+                      },
                       "pseudoDisplay": {
                         "type": "boolean"
                       },
@@ -1180,6 +1188,10 @@
                     "type": "object"
                   },
                   "type": "array"
+                },
+                "textScaleFactor": {
+                  "description": "Text scale supported by GTK and Windows. 1 corresponds to 100%.",
+                  "type": "number"
                 }
               },
               "type": "object"
diff --git a/schemas/telemetry/shield-icq-v1/shield-icq-v1.4.schema.json b/schemas/telemetry/shield-icq-v1/shield-icq-v1.4.schema.json
index 7107b6deb..e0bed7739 100644
--- a/schemas/telemetry/shield-icq-v1/shield-icq-v1.4.schema.json
+++ b/schemas/telemetry/shield-icq-v1/shield-icq-v1.4.schema.json
@@ -1147,6 +1147,14 @@
                 "monitors": {
                   "items": {
                     "properties": {
+                      "contentsScaleFactor": {
+                        "description": "The number of device pixels per desktop pixel for this screen.",
+                        "type": "number"
+                      },
+                      "defaultCSSScaleFactor": {
+                        "description": "The default number of device pixels per unscaled CSS pixel for this screen.",
+                        "type": "number"
+                      },
                       "pseudoDisplay": {
                         "type": "boolean"
                       },
@@ -1166,6 +1174,10 @@
                     "type": "object"
                   },
                   "type": "array"
+                },
+                "textScaleFactor": {
+                  "description": "Text scale supported by GTK and Windows. 1 corresponds to 100%.",
+                  "type": "number"
                 }
               },
               "type": "object"
diff --git a/schemas/telemetry/testpilot/testpilot.4.schema.json b/schemas/telemetry/testpilot/testpilot.4.schema.json
index 9deb446d2..b213b9cf4 100644
--- a/schemas/telemetry/testpilot/testpilot.4.schema.json
+++ b/schemas/telemetry/testpilot/testpilot.4.schema.json
@@ -1147,6 +1147,14 @@
                 "monitors": {
                   "items": {
                     "properties": {
+                      "contentsScaleFactor": {
+                        "description": "The number of device pixels per desktop pixel for this screen.",
+                        "type": "number"
+                      },
+                      "defaultCSSScaleFactor": {
+                        "description": "The default number of device pixels per unscaled CSS pixel for this screen.",
+                        "type": "number"
+                      },
                       "pseudoDisplay": {
                         "type": "boolean"
                       },
@@ -1166,6 +1174,10 @@
                     "type": "object"
                   },
                   "type": "array"
+                },
+                "textScaleFactor": {
+                  "description": "Text scale supported by GTK and Windows. 1 corresponds to 100%.",
+                  "type": "number"
                 }
               },
               "type": "object"
diff --git a/schemas/telemetry/third-party-modules/third-party-modules.4.schema.json b/schemas/telemetry/third-party-modules/third-party-modules.4.schema.json
index bfad29083..a3cfa20aa 100644
--- a/schemas/telemetry/third-party-modules/third-party-modules.4.schema.json
+++ b/schemas/telemetry/third-party-modules/third-party-modules.4.schema.json
@@ -1147,6 +1147,14 @@
                 "monitors": {
                   "items": {
                     "properties": {
+                      "contentsScaleFactor": {
+                        "description": "The number of device pixels per desktop pixel for this screen.",
+                        "type": "number"
+                      },
+                      "defaultCSSScaleFactor": {
+                        "description": "The default number of device pixels per unscaled CSS pixel for this screen.",
+                        "type": "number"
+                      },
                       "pseudoDisplay": {
                         "type": "boolean"
                       },
@@ -1166,6 +1174,10 @@
                     "type": "object"
                   },
                   "type": "array"
+                },
+                "textScaleFactor": {
+                  "description": "Text scale supported by GTK and Windows. 1 corresponds to 100%.",
+                  "type": "number"
                 }
               },
               "type": "object"
diff --git a/schemas/telemetry/uninstall/uninstall.4.schema.json b/schemas/telemetry/uninstall/uninstall.4.schema.json
index e1d98c540..593a0f407 100644
--- a/schemas/telemetry/uninstall/uninstall.4.schema.json
+++ b/schemas/telemetry/uninstall/uninstall.4.schema.json
@@ -1148,6 +1148,14 @@
                 "monitors": {
                   "items": {
                     "properties": {
+                      "contentsScaleFactor": {
+                        "description": "The number of device pixels per desktop pixel for this screen.",
+                        "type": "number"
+                      },
+                      "defaultCSSScaleFactor": {
+                        "description": "The default number of device pixels per unscaled CSS pixel for this screen.",
+                        "type": "number"
+                      },
                       "pseudoDisplay": {
                         "type": "boolean"
                       },
@@ -1167,6 +1175,10 @@
                     "type": "object"
                   },
                   "type": "array"
+                },
+                "textScaleFactor": {
+                  "description": "Text scale supported by GTK and Windows. 1 corresponds to 100%.",
+                  "type": "number"
                 }
               },
               "type": "object"
diff --git a/schemas/telemetry/untrusted-modules/untrusted-modules.4.schema.json b/schemas/telemetry/untrusted-modules/untrusted-modules.4.schema.json
index 2e43f66ce..4cae63ba9 100644
--- a/schemas/telemetry/untrusted-modules/untrusted-modules.4.schema.json
+++ b/schemas/telemetry/untrusted-modules/untrusted-modules.4.schema.json
@@ -1147,6 +1147,14 @@
                 "monitors": {
                   "items": {
                     "properties": {
+                      "contentsScaleFactor": {
+                        "description": "The number of device pixels per desktop pixel for this screen.",
+                        "type": "number"
+                      },
+                      "defaultCSSScaleFactor": {
+                        "description": "The default number of device pixels per unscaled CSS pixel for this screen.",
+                        "type": "number"
+                      },
                       "pseudoDisplay": {
                         "type": "boolean"
                       },
@@ -1166,6 +1174,10 @@
                     "type": "object"
                   },
                   "type": "array"
+                },
+                "textScaleFactor": {
+                  "description": "Text scale supported by GTK and Windows. 1 corresponds to 100%.",
+                  "type": "number"
                 }
               },
               "type": "object"
diff --git a/schemas/telemetry/update/update.4.schema.json b/schemas/telemetry/update/update.4.schema.json
index d45f9445b..d63a94f3c 100644
--- a/schemas/telemetry/update/update.4.schema.json
+++ b/schemas/telemetry/update/update.4.schema.json
@@ -1144,6 +1144,14 @@
                 "monitors": {
                   "items": {
                     "properties": {
+                      "contentsScaleFactor": {
+                        "description": "The number of device pixels per desktop pixel for this screen.",
+                        "type": "number"
+                      },
+                      "defaultCSSScaleFactor": {
+                        "description": "The default number of device pixels per unscaled CSS pixel for this screen.",
+                        "type": "number"
+                      },
                       "pseudoDisplay": {
                         "type": "boolean"
                       },
@@ -1163,6 +1171,10 @@
                     "type": "object"
                   },
                   "type": "array"
+                },
+                "textScaleFactor": {
+                  "description": "Text scale supported by GTK and Windows. 1 corresponds to 100%.",
+                  "type": "number"
                 }
               },
               "type": "object"
diff --git a/schemas/telemetry/voice/voice.4.schema.json b/schemas/telemetry/voice/voice.4.schema.json
index a2e5240c8..59679d60c 100644
--- a/schemas/telemetry/voice/voice.4.schema.json
+++ b/schemas/telemetry/voice/voice.4.schema.json
@@ -1147,6 +1147,14 @@
                 "monitors": {
                   "items": {
                     "properties": {
+                      "contentsScaleFactor": {
+                        "description": "The number of device pixels per desktop pixel for this screen.",
+                        "type": "number"
+                      },
+                      "defaultCSSScaleFactor": {
+                        "description": "The default number of device pixels per unscaled CSS pixel for this screen.",
+                        "type": "number"
+                      },
                       "pseudoDisplay": {
                         "type": "boolean"
                       },
@@ -1166,6 +1174,10 @@
                     "type": "object"
                   },
                   "type": "array"
+                },
+                "textScaleFactor": {
+                  "description": "Text scale supported by GTK and Windows. 1 corresponds to 100%.",
+                  "type": "number"
                 }
               },
               "type": "object"
diff --git a/templates/include/telemetry/environment.1.schema.json b/templates/include/telemetry/environment.1.schema.json
index 67eb7ffa8..b6bd2021a 100644
--- a/templates/include/telemetry/environment.1.schema.json
+++ b/templates/include/telemetry/environment.1.schema.json
@@ -903,6 +903,14 @@
               "items": {
                 "type": "object",
                 "properties": {
+                  "contentsScaleFactor": {
+                    "description": "The number of device pixels per desktop pixel for this screen.",
+                    "type": "number"
+                  },
+                  "defaultCSSScaleFactor": {
+                    "description": "The default number of device pixels per unscaled CSS pixel for this screen.",
+                    "type": "number"
+                  },
                   "screenWidth": {
                     "type": "integer"
                   },
@@ -1103,6 +1111,10 @@
             "TargetFrameRate": {
               "description": "Frame rate in Hz, typically 60 or more, see bug 1840381",
               "type": "integer"
+            },
+            "textScaleFactor": {
+              "description": "Text scale supported by GTK and Windows. 1 corresponds to 100%.",
+              "type": "number"
             }
           }
         },
diff --git a/validation/telemetry/main.4.sample.pass.json b/validation/telemetry/main.4.sample.pass.json
index 2f2937ebf..bae3f0846 100644
--- a/validation/telemetry/main.4.sample.pass.json
+++ b/validation/telemetry/main.4.sample.pass.json
@@ -389,6 +389,7 @@
         "D2DEnabled": null,
         "LowEndMachine": false,
         "DWriteEnabled": null,
+        "textScaleFactor": 1,
         "adapters": [
           {
             "GPUActive": true,
@@ -410,6 +411,12 @@
             "scale": 2,
             "screenHeight": 900,
             "screenWidth": 1440
+          },
+          {
+            "contentsScaleFactor": 2,
+            "defaultCSSScaleFactor": 2,
+            "screenHeight": 900,
+            "screenWidth": 1440
           }
         ]
       },