diff --git a/development/build/scripts.js b/development/build/scripts.js
index 798edd9db..7cdba547a 100644
--- a/development/build/scripts.js
+++ b/development/build/scripts.js
@@ -773,7 +773,7 @@ function setupBundlerDefaults(
     // Look for TypeScript files when walking the dependency tree
     extensions,
     // Use entryFilepath for moduleIds, easier to determine origin file
-    fullPaths: devMode,
+    fullPaths: devMode || testing,
     // For sourcemaps
     debug: true,
   });
diff --git a/package.json b/package.json
index e68dec500..dc9b0259f 100644
--- a/package.json
+++ b/package.json
@@ -11,12 +11,13 @@
     "setup:postinstall": "yarn patch-package && yarn allow-scripts",
     "start": "yarn build:dev dev --apply-lavamoat=false",
     "start:lavamoat": "yarn build:dev dev --apply-lavamoat=true",
-    "start:mv3": "ENABLE_MV3=true yarn build:dev dev --apply-lavamoat=false",
+    "start:mv3": "ENABLE_MV3=true yarn build:dev dev --apply-lavamoat=true",
     "dist": "yarn build prod",
     "build": "yarn lavamoat:build",
     "build:dev": "node development/build/index.js",
     "start:test": "SEGMENT_HOST='https://api.segment.io' SEGMENT_WRITE_KEY='FAKE' yarn build testDev",
     "benchmark:chrome": "SELENIUM_BROWSER=chrome node test/e2e/benchmark.js",
+    "mv3:stats:chrome": "SELENIUM_BROWSER=chrome ENABLE_MV3=true node test/e2e/lavamoat-stats.js",
     "benchmark:firefox": "SELENIUM_BROWSER=firefox node test/e2e/benchmark.js",
     "build:test": "SEGMENT_HOST='https://api.segment.io' SEGMENT_WRITE_KEY='FAKE' yarn build test",
     "build:test:flask": "yarn build test --build-type flask",
diff --git a/test/e2e/lavamoat-stats.js b/test/e2e/lavamoat-stats.js
new file mode 100644
index 000000000..4abf00a68
--- /dev/null
+++ b/test/e2e/lavamoat-stats.js
@@ -0,0 +1,140 @@
+#!/usr/bin/env node
+
+/* eslint-disable node/shebang */
+const path = require('path');
+const { promises: fs, constants: fsConstants } = require('fs');
+const yargs = require('yargs/yargs');
+const { hideBin } = require('yargs/helpers');
+const { exitWithError } = require('../../development/lib/exit-with-error');
+const { withFixtures, tinyDelayMs } = require('./helpers');
+
+async function measurePage() {
+  let metrics;
+  try {
+    await withFixtures({ fixtures: 'imported-account' }, async ({ driver }) => {
+      await driver.delay(tinyDelayMs);
+      await driver.navigate();
+      await driver.findElement('#password');
+      await driver.delay(1000);
+      const logs = await driver.checkBrowserForLavamoatLogs();
+
+      let logString = '';
+      let inObject = false;
+
+      const parsedLogs = [];
+
+      logs.forEach((log) => {
+        if (log.indexOf('"version": 1') >= 0) {
+          logString += log;
+          parsedLogs.push(`{${logString}}`);
+          logString = '';
+          inObject = false;
+        } else if (inObject) {
+          logString += log;
+        } else if (
+          log.search(/"name": ".*app\/scripts\/background.js",/u) >= 0 ||
+          log.search(/"name": ".*app\/scripts\/ui.js",/u) >= 0
+        ) {
+          logString += log;
+          inObject = true;
+        }
+      });
+
+      metrics = parsedLogs.map((pl) => JSON.parse(pl));
+    });
+  } catch (error) {
+    // do nothing
+  }
+  return metrics;
+}
+
+async function profilePageLoad() {
+  const results = await measurePage();
+  const metrics = {};
+
+  metrics['background.js'] = results[0];
+  metrics['ui.js'] = results[1];
+
+  return metrics;
+}
+
+async function isWritable(directory) {
+  try {
+    await fs.access(directory, fsConstants.W_OK);
+    return true;
+  } catch (error) {
+    if (error.code !== 'EACCES') {
+      throw error;
+    }
+    return false;
+  }
+}
+
+async function getFirstParentDirectoryThatExists(directory) {
+  let nextDirectory = directory;
+  for (;;) {
+    try {
+      await fs.access(nextDirectory, fsConstants.F_OK);
+      return nextDirectory;
+    } catch (error) {
+      if (error.code !== 'ENOENT') {
+        throw error;
+      } else if (nextDirectory === path.dirname(nextDirectory)) {
+        throw new Error('Failed to find parent directory that exists');
+      }
+      nextDirectory = path.dirname(nextDirectory);
+    }
+  }
+}
+
+async function main() {
+  const { argv } = yargs(hideBin(process.argv)).usage(
+    '$0 [options]',
+    'Run a page load benchmark',
+    (_yargs) =>
+      _yargs.option('out', {
+        description:
+          'Output filename. Output printed to STDOUT of this is omitted.',
+        type: 'string',
+        normalize: true,
+      }),
+  );
+
+  const { out } = argv;
+
+  let outputDirectory;
+  let existingParentDirectory;
+  if (out) {
+    outputDirectory = path.dirname(out);
+    existingParentDirectory = await getFirstParentDirectoryThatExists(
+      outputDirectory,
+    );
+    if (!(await isWritable(existingParentDirectory))) {
+      throw new Error('Specified output file directory is not writable');
+    }
+  }
+
+  const results = await profilePageLoad();
+
+  if (out) {
+    if (outputDirectory !== existingParentDirectory) {
+      await fs.mkdir(outputDirectory, { recursive: true });
+    }
+
+    await fs.writeFile(
+      path.join(out, 'background.json'),
+      JSON.stringify(results['background.js'], null, 2),
+    );
+
+    await fs.writeFile(
+      path.join(out, 'ui.json'),
+      JSON.stringify(results['ui.js'], null, 2),
+    );
+  } else {
+    console.log(JSON.stringify(results, null, 2));
+  }
+}
+
+main().catch((error) => {
+  exitWithError(error);
+});
diff --git a/test/e2e/webdriver/chrome.js b/test/e2e/webdriver/chrome.js
index a9df3e646..09069906c 100644
--- a/test/e2e/webdriver/chrome.js
+++ b/test/e2e/webdriver/chrome.js
@@ -18,7 +18,14 @@ class ChromeDriver {
     if (responsive) {
       args.push('--auto-open-devtools-for-tabs');
     }
-    args.push('--log-level=3');
+
+    if (process.env.ENABLE_MV3) {
+      args.push('--log-level=0');
+      args.push('--enable-logging');
+      args.push(`--user-data-dir=${process.cwd()}/test-artifacts/chrome`);
+    } else {
+      args.push('--log-level=3');
+    }
     const options = new chrome.Options().addArguments(args);
     options.setProxy(proxy.manual({ https: HTTPS_PROXY_HOST }));
     options.setAcceptInsecureCerts(true);
diff --git a/test/e2e/webdriver/driver.js b/test/e2e/webdriver/driver.js
index 73c029bfe..9886872a4 100644
--- a/test/e2e/webdriver/driver.js
+++ b/test/e2e/webdriver/driver.js
@@ -397,6 +397,20 @@ class Driver {
     );
   }
 
+  async checkBrowserForLavamoatLogs() {
+    const browserLogs = (
+      await fs.readFile(
+        `${process.cwd()}/test-artifacts/chrome/chrome_debug.log`,
+      )
+    )
+      .toString('utf-8')
+      .split(/\r?\n/u);
+
+    await fs.writeFile('/tmp/all_logs.json', JSON.stringify(browserLogs));
+
+    return browserLogs;
+  }
+
   async checkBrowserForConsoleErrors() {
     const ignoredLogTypes = ['WARNING'];
     const ignoredErrorMessages = [