diff --git a/src/background/main.ts b/src/background/main.ts
index 45b6041..5b89fca 100644
--- a/src/background/main.ts
+++ b/src/background/main.ts
@@ -1,4 +1,5 @@
 import browser from "webextension-polyfill";
+import * as Sentry from "@sentry/browser";
 
 import { MessageType } from "src/types";
 import { Codecov } from "src/service";
@@ -9,6 +10,21 @@ import {
 
 async function main(): Promise<void> {
   browser.runtime.onMessage.addListener(handleMessages);
+
+  Sentry.init({
+    // @ts-ignore SENTRY_DSN is populated by Webpack at build time
+    dsn: SENTRY_DSN,
+
+    integrations: [
+      Sentry.browserTracingIntegration({
+        // disable automatic span creation
+        instrumentNavigation: false,
+        instrumentPageLoad: false,
+      }),
+    ],
+
+    tracesSampleRate: 1.0,
+  });
 }
 
 async function handleMessages(message: {
@@ -16,22 +32,24 @@ async function handleMessages(message: {
   payload: any;
   referrer?: string;
 }) {
-  switch (message.type) {
-    case MessageType.FETCH_COMMIT_REPORT:
-      return Codecov.fetchCommitReport(message.payload, message.referrer!);
-    case MessageType.FETCH_PR_COMPARISON:
-      return Codecov.fetchPRComparison(message.payload, message.referrer!);
-    case MessageType.FETCH_FLAGS_LIST:
-      return Codecov.listFlags(message.payload, message.referrer!);
-    case MessageType.FETCH_COMPONENTS_LIST:
-      return Codecov.listComponents(message.payload, message.referrer!);
-    case MessageType.CHECK_AUTH:
-      return Codecov.checkAuth(message.payload);
-    case MessageType.REGISTER_CONTENT_SCRIPTS:
-      return registerContentScript(message.payload);
-    case MessageType.UNREGISTER_CONTENT_SCRIPTS:
-      return unregisterContentScriptIfExists(message.payload);
-  }
+  return Sentry.startSpan({ name: message.type }, async () => {
+    switch (message.type) {
+      case MessageType.FETCH_COMMIT_REPORT:
+        return Codecov.fetchCommitReport(message.payload, message.referrer!);
+      case MessageType.FETCH_PR_COMPARISON:
+        return Codecov.fetchPRComparison(message.payload, message.referrer!);
+      case MessageType.FETCH_FLAGS_LIST:
+        return Codecov.listFlags(message.payload, message.referrer!);
+      case MessageType.FETCH_COMPONENTS_LIST:
+        return Codecov.listComponents(message.payload, message.referrer!);
+      case MessageType.CHECK_AUTH:
+        return Codecov.checkAuth(message.payload);
+      case MessageType.REGISTER_CONTENT_SCRIPTS:
+        return registerContentScript(message.payload);
+      case MessageType.UNREGISTER_CONTENT_SCRIPTS:
+        return unregisterContentScriptIfExists(message.payload);
+    }
+  });
 }
 
 main().catch(console.log);
diff --git a/webpack/webpack.common.js b/webpack/webpack.common.js
index 80d492a..cc98076 100644
--- a/webpack/webpack.common.js
+++ b/webpack/webpack.common.js
@@ -50,7 +50,7 @@ module.exports = {
       browser: "webextensions-polyfill",
     }),
     new DefinePlugin({
-      SENTRY_DSN: process.env.SENTRY_DSN
-    })
+      SENTRY_DSN: JSON.stringify(process.env.SENTRY_DSN),
+    }),
   ],
 };