This PR introduces significant changes to improve stability and maintainability by switching to Chrome for Testing as the default browser.

1. Installer Changes on Channel Name Installs

This update replaces previous Chromium builds with the official Chrome for Testing browser on channel name installs. The installation process is simplified by using a standardized Chrome for Testing distribution. The action previously installed the browser to C:\Program Files using the official installer on Windows, or to $RUNNER_TOOL_CACHE on Linux and macOS with the official archive. Now, the action will install the browser to $RUNNER_TOOL_CACHE from Chrome for Testing.

2. Cache Directory Changes

This update introduces a new cache directory structure for the Chrome for Testing browser. The cache directory is now named chrome instead of chromium.

3. Default Version Changes

Previously, the action installed the latest snapshot version. Now, the action will install the stable version of Chrome for Testing by default.

Migration Guide

1. Installer Changes on Channel Name Installs

If you are using the channel name (stable, beta, dev, or canary) to install the browser, the new version of the action installs the browser from Chrome for Testing instead of the official installer. Please check if your workflow is using the expected browser binary version with the new version of the action.

The installed browser binary with the channel name is as follows:

On Windows runner, the installed location is changed from C:\Program Files to $RUNNER_TOOL_CACHE.

2. Cache Directory Changes

If you are self-hosted runner and installing the browser with the channel name to speed up the runner setup, please update your cache directory on your runners. The cache directory has been changed from chromium to chrome and ensure that your workflow is using the new cache directory.

3. Default Version Changes

If you don't specify chrome-version parameter in your workflow, please ensure that your workflow will install the expected version of Chrome for Testing. The default version is the stable channel version of Chrome for Testing instead of the latest version. To install the latest version, you need to specify chrome-version: latest in your workflow.

# v1
- name: Install the stable version of Chrome for Testing
  uses: browser-actions/setup-chrome@v1
  with:
    chrome-version: stable
- name: Install the latest version of Chrome for Testing
  uses: browser-actions/setup-chrome@v1

# v2
- name: Install the stable version of Chrome for Testing
  uses: browser-actions/setup-chrome@v2

- name: Install the latest version of Chrome for Testing
  uses: browser-actions/setup-chrome@v2
  with:
    chrome-version: latest