2 files changed, 19 insertions, 0 deletions
diff --git a/toolkit/components/messaging-system/schemas/TriggerActionSchemas/TriggerActionSchemas.json b/toolkit/components/messaging-system/schemas/TriggerActionSchemas/TriggerActionSchemas.json
index 6a7d2328d7..773b84aa4a 100644
--- a/toolkit/components/messaging-system/schemas/TriggerActionSchemas/TriggerActionSchemas.json
+++ b/toolkit/components/messaging-system/schemas/TriggerActionSchemas/TriggerActionSchemas.json
@@ -169,6 +169,18 @@
           "properties": {
             "id": {
               "type": "string",
+              "enum": ["deeplinkedToWindowsSettingsUI"]
+            }
+          },
+          "additionalProperties": false,
+          "required": ["id"],
+          "description": "Occurs when user indicates they want to set Firefox to the default browser and they need to interact with Windows Settings to do so."
+        },
+        {
+          "type": "object",
+          "properties": {
+            "id": {
+              "type": "string",
               "enum": ["captivePortalLogin"]
             }
           },
diff --git a/toolkit/components/messaging-system/schemas/TriggerActionSchemas/index.md b/toolkit/components/messaging-system/schemas/TriggerActionSchemas/index.md
index 85be613392..45df09249a 100644
--- a/toolkit/components/messaging-system/schemas/TriggerActionSchemas/index.md
+++ b/toolkit/components/messaging-system/schemas/TriggerActionSchemas/index.md
@@ -44,6 +44,7 @@ let patterns: string[];
 * [formAutofill](#formautofill)
 * [contentBlocking](#contentblocking)
 * [defaultBrowserCheck](#defaultbrowsercheck)
+* [deeplinkedToWindowsSettingsUI](#deeplinkedtowindowssettingsui)
 * [captivePortalLogin](#captiveportallogin)
 * [preferenceObserver](#preferenceobserver)
 * [featureCalloutCheck](#featurecalloutcheck)
@@ -161,6 +162,12 @@ let willShowDefaultPrompt = boolean | undefined;
 }
 ```
 
+### `deeplinkedToWindowsSettingsUI`
+
+Triggers when the user has indicated they want to set Firefox as the default web
+browser and interaction with Windows Settings is necessary to finish setting
+Firefox as default.
+
 ### `captivePortalLogin`
 
 Happens when the user successfully goes through a captive portal authentication flow.