Bug 1907170: Collect navigator properties. r=timhuang

Differential Revision: https://phabricator.services.mozilla.com/D216213

toolkit/components/resistfingerprinting/UserCharacteristicsPageService.sys.mjs

@@ -408,6 +408,9 @@ export class UserCharacteristicsPageService {
         "mathml9",
         "mathml10",
         "monochrome",
+        "oscpu",
+        "pdfViewer",
+        "platform",
       ],
     };
 

toolkit/components/resistfingerprinting/content/usercharacteristics.js

@@ -950,6 +950,14 @@ async function populateCSSQueries() {
   };
 }
 
+async function populateNavigatorProperties() {
+  return {
+    oscpu: navigator.oscpu,
+    pdfViewer: navigator.pdfViewerEnabled,
+    platform: navigator.platform,
+  };
+}
+
 async function populatePointerInfo() {
   const capabilities = {
     None: 0,
@@ -1228,6 +1236,7 @@ const LocalFiraSans = new FontFace(
     populateSensorInfo,
     populateMathML,
     populateCSSQueries,
+    populateNavigatorProperties,
   ];
   // Catches errors in promise-creating functions. E.g. if populateVoiceList
   // throws an error before returning any of its `key: (Promise<any> | any)`

toolkit/components/resistfingerprinting/metrics.yaml

@@ -2604,3 +2604,54 @@ characteristics:
     expires: never
     data_sensitivity:
       - technical
+
+  oscpu:
+    type: string
+    description: >
+      User's OS CPU reported by the navigator
+    lifetime: application
+    send_in_pings:
+      - user-characteristics
+    notification_emails:
+      - tom@mozilla.com
+    bugs:
+      - https://bugzilla.mozilla.org/show_bug.cgi?id=1907170
+    data_reviews:
+      - https://bugzilla.mozilla.org/show_bug.cgi?id=1907170#c1
+    expires: never
+    data_sensitivity:
+      - technical
+
+  pdf_viewer:
+    type: boolean
+    description: >
+      PDF viewer support reported by the navigator
+    lifetime: application
+    send_in_pings:
+      - user-characteristics
+    notification_emails:
+      - tom@mozilla.com
+    bugs:
+      - https://bugzilla.mozilla.org/show_bug.cgi?id=1907170
+    data_reviews:
+      - https://bugzilla.mozilla.org/show_bug.cgi?id=1907170#c1
+    expires: never
+    data_sensitivity:
+      - technical
+
+  platform:
+    type: string
+    description: >
+      Platform reported by the navigator
+    lifetime: application
+    send_in_pings:
+      - user-characteristics
+    notification_emails:
+      - tom@mozilla.com
+    bugs:
+      - https://bugzilla.mozilla.org/show_bug.cgi?id=1907170
+    data_reviews:
+      - https://bugzilla.mozilla.org/show_bug.cgi?id=1907170#c1
+    expires: never
+    data_sensitivity:
+      - technical