DEV: Set a browser read timeout in capybara (#24757)

Gemfile

@@ -128,6 +128,7 @@ group :test do
   gem "minitest", require: false
   gem "simplecov", require: false
   gem "selenium-webdriver", "~> 4.14", require: false
+  gem "selenium-devtools", require: false
   gem "test-prof"
   gem "rails-dom-testing", require: false
   gem "minio_runner", require: false

Gemfile.lock

@@ -461,6 +461,8 @@ GEM
       google-protobuf (~> 3.23)
     sass-embedded (1.66.1-x86_64-linux-gnu)
       google-protobuf (~> 3.23)
+    selenium-devtools (0.120.0)
+      selenium-webdriver (~> 4.2)
     selenium-webdriver (4.16.0)
       rexml (~> 3.2, >= 3.2.5)
       rubyzip (>= 1.2.2, < 3.0)
@@ -647,6 +649,7 @@ DEPENDENCIES
   ruby-readability
   rubyzip
   sanitize
+  selenium-devtools
   selenium-webdriver (~> 4.14)
   shoulda-matchers!
   sidekiq

spec/rails_helper.rb

@@ -176,6 +176,7 @@ end
 RSpec.configure { |config| config.extend Prefabrication }
 
 PER_SPEC_TIMEOUT_SECONDS = 30
+BROWSER_READ_TIMEOUT = 30
 
 RSpec.configure do |config|
   config.fail_fast = ENV["RSPEC_FAIL_FAST"] == "1"
@@ -387,7 +388,8 @@ RSpec.configure do |config|
           options.add_preference("download.default_directory", Downloads::FOLDER)
         end
 
-    driver_options = { browser: :chrome }
+    client = Selenium::WebDriver::Remote::Http::Default.new(read_timeout: BROWSER_READ_TIMEOUT)
+    driver_options = { browser: :chrome, http_client: client }
 
     if ENV["CAPYBARA_REMOTE_DRIVER_URL"].present?
       driver_options[:browser] = :remote

spec/support/system_helpers.rb

@@ -148,16 +148,11 @@ module SystemHelpers
   end
 
   def using_browser_timezone(timezone, &example)
-    previous_browser_timezone = ENV["TZ"]
-
-    ENV["TZ"] = timezone
-
     using_session(timezone) do |session|
+      page.driver.browser.devtools.emulation.set_timezone_override(timezone_id: timezone)
       freeze_time(&example)
       session.quit
     end
-
-    ENV["TZ"] = previous_browser_timezone
   end
 
   # When using parallelism, Capybara's `using_session` method can cause