misc: convert @packages/launcher tests from mocha to vitest and always prefer 64-bit install paths to 32-bit

.circleci/src/pipeline/@pipeline.yml

@@ -17,7 +17,7 @@ ubuntu-2004-current: &ubuntu-2004-current ubuntu-2004:2024.11.1
 ubuntu-2004-older: &ubuntu-2004-older ubuntu-2004:2024.05.1
 
 orbs:
-  browser-tools: circleci/browser-tools@2.1.1
+  browser-tools: circleci/browser-tools@2.3.1
 
 defaults: &defaults
   parallelism: 1
@@ -563,6 +563,7 @@ commands:
                       # https://www.ubuntuupdates.org/package/google_chrome/stable/main/base/google-chrome-stable
                       channel: << parameters.google-chrome-channel >>
                       chrome_version: << parameters.google-chrome-version >>
+                      replace_existing: true
                   - when:
                       condition:
                         equal: [ 'beta', << parameters.google-chrome-channel>> ]
@@ -1786,7 +1787,7 @@ jobs:
                   source ./scripts/ensure-node.sh
                   yarn lerna run types
             - sanitize-verify-and-store-mocha-results:
-                expectedResultCount: 10
+                expectedResultCount: 9
 
   verify-release-readiness:
     <<: *defaults

cli/CHANGELOG.md

@@ -1,4 +1,12 @@
 <!-- See the ../guides/writing-the-cypress-changelog.md for details on writing the changelog. -->
+## 15.4.1
+
+_Released 10/21/2025 (PENDING)_
+
+**Misc:**
+
+Browser detection in Cypress now always prefers 64-bit browser installs to 32-bit browser installs. Addressed in [#32656](https://github.com/cypress-io/cypress/pull/32656).
+
 ## 15.4.0
 
 _Released 10/7/2025_

guides/esm-migration.md

@@ -98,7 +98,7 @@ When migrating some of these projects away from the `ts-node` entry [see `@packa
 - [ ] packages/https-proxy
 - [x] packages/electron ✅ **COMPLETED**
 - [x] packages/icons ✅ **COMPLETED**
-- [ ] packages/launcher
+- [x] packages/launcher ✅ **COMPLETED**
 - [ ] packages/net-stubbing
 - [x] packages/network ✅ **COMPLETED**
 - [ ] packages/packherd-require