diff --git a/.eslintignore b/.eslintignore
index 29d33afa276..77ccb9293dc 100644
--- a/.eslintignore
+++ b/.eslintignore
@@ -19,7 +19,7 @@ test/output-*/
 coverage/
 generated/
 .eslintcache
-/.cache/
+.cache/
 
 # IDE Artifacts
 .vscode
diff --git a/.eslintrc.js b/.eslintrc.js
index 91f9b8abedd..29d53928015 100644
--- a/.eslintrc.js
+++ b/.eslintrc.js
@@ -35,7 +35,7 @@ module.exports = {
 
   parser: '@typescript-eslint/parser',
 
-  plugins: ['mocha', '@typescript-eslint', 'import'],
+  plugins: ['mocha', '@typescript-eslint', 'import', 'rulesdir'],
 
   extends: ['plugin:prettier/recommended', 'plugin:import/typescript'],
 
@@ -144,6 +144,11 @@ module.exports = {
       // Don't allow underscored declarations on camelCased variables/properties.
       // ...RESTRICTED_UNDERSCORED_IDENTIFIERS,
     ],
+
+    // Keeps comments formatted.
+    'rulesdir/prettier-comments': 'error',
+    // Enforces consistent file extension
+    'rulesdir/extensions': 'error',
   },
   overrides: [
     {
@@ -157,14 +162,10 @@ module.exports = {
         'plugin:@typescript-eslint/recommended',
         'plugin:@typescript-eslint/stylistic',
       ],
-      plugins: ['eslint-plugin-tsdoc', 'rulesdir'],
+      plugins: ['eslint-plugin-tsdoc'],
       rules: {
-        // Keeps comments formatted.
-        'rulesdir/prettier-comments': 'error',
         // Enforces clean up of used resources.
         'rulesdir/use-using': 'error',
-        // Enforces consistent file extension
-        'rulesdir/extensions': 'error',
         // Brackets keep code readable.
         curly: ['error', 'all'],
         // Brackets keep code readable and `return` intentions clear.
diff --git a/.gitignore b/.gitignore
index ff9659ba120..17024fb5b12 100644
--- a/.gitignore
+++ b/.gitignore
@@ -18,7 +18,7 @@ test/output-*/
 coverage/
 generated/
 .eslintcache
-/.cache/
+.cache/
 
 # IDE Artifacts
 .vscode/*
diff --git a/.prettierignore b/.prettierignore
index d24dd689d2e..9da3d6ad79c 100644
--- a/.prettierignore
+++ b/.prettierignore
@@ -19,7 +19,7 @@ test/output-*/
 coverage/
 generated/
 .eslintcache
-/.cache/
+.cache/
 
 # IDE Artifacts
 .vscode/*
diff --git a/Herebyfile.mjs b/Herebyfile.mjs
index 4a1c30f499f..c73d0990662 100644
--- a/Herebyfile.mjs
+++ b/Herebyfile.mjs
@@ -1,11 +1,10 @@
 import {copyFile, readFile, writeFile} from 'fs/promises';
 
+import {docgen, spliceIntoSection} from '@puppeteer/docgen';
 import {execa} from 'execa';
 import {task} from 'hereby';
 import semver from 'semver';
 
-import {docgen, spliceIntoSection} from '@puppeteer/docgen';
-
 export const docsNgSchematicsTask = task({
   name: 'docs:ng-schematics',
   run: async () => {
diff --git a/examples/cross-browser.js b/examples/cross-browser.js
index 5027afb8752..0f972a0b703 100644
--- a/examples/cross-browser.js
+++ b/examples/cross-browser.js
@@ -3,16 +3,14 @@ const puppeteer = require('puppeteer');
 /**
  * To have Puppeteer fetch a Firefox binary for you, first run:
  *
- *  PUPPETEER_PRODUCT=firefox npm install
+ * PUPPETEER_PRODUCT=firefox npm install
  *
  * To get additional logging about which browser binary is executed,
  * run this example as:
  *
- *   DEBUG=puppeteer:launcher NODE_PATH=../ node examples/cross-browser.js
+ * DEBUG=puppeteer:launcher NODE_PATH=../ node examples/cross-browser.js
  *
  * You can set a custom binary with the `executablePath` launcher option.
- *
- *
  */
 
 const firefoxOptions = {
diff --git a/package.json b/package.json
index 5145c777658..1311e842685 100644
--- a/package.json
+++ b/package.json
@@ -15,11 +15,11 @@
     "docs": "wireit",
     "doctest": "wireit",
     "format": "run-s format:*",
-    "format:eslint": "eslint --ext js --ext ts --fix .",
+    "format:eslint": "eslint --ext js --ext mjs --ext ts --fix .",
     "format:expectations": "node tools/sort-test-expectations.mjs",
     "format:prettier": "prettier --write .",
     "lint": "run-s lint:*",
-    "lint:eslint": "([ \"$CI\" = true ] && eslint --ext js --ext ts --quiet . || eslint --ext js --ext ts .)",
+    "lint:eslint": "eslint --ext js --ext mjs --ext ts .",
     "lint:prettier": "prettier --check .",
     "lint:expectations": "node tools/sort-test-expectations.mjs --lint",
     "postinstall": "npm run postinstall --workspaces --if-present",
diff --git a/packages/browsers/.gitignore b/packages/browsers/.gitignore
deleted file mode 100644
index 23b2baa7cae..00000000000
--- a/packages/browsers/.gitignore
+++ /dev/null
@@ -1 +0,0 @@
-test/cache
\ No newline at end of file
diff --git a/packages/browsers/test/src/chrome/launch.spec.ts b/packages/browsers/test/src/chrome/launch.spec.ts
index 983b6d1e47e..c420d9e0b6d 100644
--- a/packages/browsers/test/src/chrome/launch.spec.ts
+++ b/packages/browsers/test/src/chrome/launch.spec.ts
@@ -27,9 +27,9 @@ describe('Chrome', () => {
         browser: Browser.CHROME,
         platform: BrowserPlatform.LINUX,
         buildId: '123',
-        cacheDir: 'cache',
+        cacheDir: '.cache',
       }),
-      path.join('cache', 'chrome', 'linux-123', 'chrome-linux64', 'chrome')
+      path.join('.cache', 'chrome', 'linux-123', 'chrome-linux64', 'chrome')
     );
   });
 
diff --git a/packages/browsers/test/src/chromium/launch.spec.ts b/packages/browsers/test/src/chromium/launch.spec.ts
index abaef10c0e1..8cf7c8255b6 100644
--- a/packages/browsers/test/src/chromium/launch.spec.ts
+++ b/packages/browsers/test/src/chromium/launch.spec.ts
@@ -27,9 +27,9 @@ describe('Chromium', () => {
         browser: Browser.CHROMIUM,
         platform: BrowserPlatform.LINUX,
         buildId: '123',
-        cacheDir: 'cache',
+        cacheDir: '.cache',
       }),
-      path.join('cache', 'chromium', 'linux-123', 'chrome-linux', 'chrome')
+      path.join('.cache', 'chromium', 'linux-123', 'chrome-linux', 'chrome')
     );
   });
 
diff --git a/packages/browsers/test/src/firefox/launch.spec.ts b/packages/browsers/test/src/firefox/launch.spec.ts
index 69372f5ba39..3c62c874489 100644
--- a/packages/browsers/test/src/firefox/launch.spec.ts
+++ b/packages/browsers/test/src/firefox/launch.spec.ts
@@ -27,9 +27,9 @@ describe('Firefox', () => {
         browser: Browser.FIREFOX,
         platform: BrowserPlatform.LINUX,
         buildId: '123',
-        cacheDir: 'cache',
+        cacheDir: '.cache',
       }),
-      path.join('cache', 'firefox', 'linux-123', 'firefox', 'firefox')
+      path.join('.cache', 'firefox', 'linux-123', 'firefox', 'firefox')
     );
   });
 
diff --git a/packages/browsers/test/src/utils.ts b/packages/browsers/test/src/utils.ts
index d68a054169f..bae231423e2 100644
--- a/packages/browsers/test/src/utils.ts
+++ b/packages/browsers/test/src/utils.ts
@@ -33,7 +33,7 @@ export function createMockedReadlineInterface(
 }
 
 const startServer = async () => {
-  const assetsPath = path.join(__dirname, '..', 'cache', 'server');
+  const assetsPath = path.join(__dirname, '..', '.cache', 'server');
   return await TestServer.create(assetsPath);
 };
 
diff --git a/packages/browsers/tools/downloadTestBrowsers.mjs b/packages/browsers/tools/downloadTestBrowsers.mjs
index 477137dcd9c..e9c4ec963a2 100644
--- a/packages/browsers/tools/downloadTestBrowsers.mjs
+++ b/packages/browsers/tools/downloadTestBrowsers.mjs
@@ -5,7 +5,7 @@
  */
 
 /**
- * Downloads test browser binaries to test/cache/server folder that
+ * Downloads test browser binaries to test/.cache/server folder that
  * mirrors the structure of the download server.
  */
 
@@ -32,7 +32,7 @@ function getBrowser(str) {
   }
 }
 
-const cacheDir = normalize(join('.', 'test', 'cache'));
+const cacheDir = normalize(join('.', 'test', '.cache'));
 
 for (const version of Object.keys(versions)) {
   const browser = getBrowser(version);
diff --git a/tools/download_chrome_bidi.mjs b/tools/download_chrome_bidi.mjs
index 9a1f0121c3c..faa73d9a959 100644
--- a/tools/download_chrome_bidi.mjs
+++ b/tools/download_chrome_bidi.mjs
@@ -13,8 +13,9 @@
  * param for GitHub actions.
  *
  * Examples:
- *  - `node install-browser.mjs`
- *  - `node install-browser.mjs /tmp/cache`
+ *
+ * - `node install-browser.mjs`
+ * - `node install-browser.mjs /tmp/cache`
  */
 import {readFile} from 'node:fs/promises';
 import {createRequire} from 'node:module';
diff --git a/website/archive.js b/website/archive.js
index 2f363cbd337..7afd5ab42e9 100644
--- a/website/archive.js
+++ b/website/archive.js
@@ -1,5 +1,6 @@
 /**
  * "Archives" older versions of the website docs to reduce the build time:
+ *
  * - keeps one latest version + next
  * - moves older versions to versionsArchived.json
  */