[PM-19814] Add phishing detection feature flag.

apps/browser/src/background/main.background.ts

@@ -1310,12 +1310,23 @@ export default class MainBackground {
 
     this.inlineMenuFieldQualificationService = new InlineMenuFieldQualificationService();
 
-    PhishingDetectionService.initialize(
-      this.auditService,
-      this.logService,
-      this.storageService,
-      this.taskSchedulerService,
-    );
+    this.configService
+      .getFeatureFlag(FeatureFlag.PhishingDetection)
+      .then((enabled) => {
+        if (enabled) {
+          PhishingDetectionService.initialize(
+            this.auditService,
+            this.logService,
+            this.storageService,
+            this.taskSchedulerService,
+          );
+        } else {
+          this.logService.info("phishing detection feature flag is disabled.");
+        }
+      })
+      .catch((error) =>
+        this.logService.error("Failed to check phishing detection feature flag", error),
+      );
   }
 
   async bootstrap() {

apps/browser/src/platform/services/phishing-detection.service.ts

@@ -54,6 +54,8 @@ export class PhishingDetectionService {
 
     // Set up periodic updates every 24 hours
     this.setupPeriodicUpdates();
+
+    PhishingDetectionService.logService.info("Phishing detection feature is initialized.");
   }
 
   private static setupPeriodicUpdates() {