[rb] Add guard for beta firefox

rb/spec/integration/selenium/webdriver/network_spec.rb

@@ -21,7 +21,7 @@
 
 module Selenium
   module WebDriver
-    describe Network, exclude: {version: GlobalTestEnv.beta_chrome_version},
+    describe Network, exclude: {version: 'beta'},
                       exclusive: {bidi: true, reason: 'only executed when bidi is enabled'},
                       only: {browser: %i[chrome edge firefox]} do
       let(:username) { SpecSupport::RackServer::TestApp::BASIC_AUTH_CREDENTIALS.first }

rb/spec/integration/selenium/webdriver/spec_support/test_environment.rb

@@ -58,7 +58,7 @@ def browser
         end
 
         def browser_version
-          driver_instance.capabilities.browser_version
+          ENV.fetch('WD_BROWSER_VERSION', 'stable')
         end
 
         def driver_instance(...)
@@ -193,18 +193,6 @@ def create_driver!(listener: nil, **, &block)
           raise e
         end
 
-        def beta_chrome_version
-          chrome_beta_url = 'https://chromereleases.googleblog.com/search/label/Beta%20updates'
-
-          uri = URI.parse(chrome_beta_url)
-
-          response = Net::HTTP.get_response(uri)
-
-          return "Failed to fetch Chrome Beta page: #{response&.code}" unless response.is_a?(Net::HTTPSuccess)
-
-          response.body.match(/\d+\.\d+\.\d+\.\d+/).to_s
-        end
-
         private
 
         def build_options(**)

rb/spec/tests.bzl

@@ -111,6 +111,7 @@ BROWSERS = {
         "env": {
             "WD_REMOTE_BROWSER": "firefox",
             "WD_SPEC_DRIVER": "firefox",
+            "WD_BROWSER_VERSION": "beta",
         } | select({
             "@selenium//common:use_pinned_linux_firefox": {
                 "FIREFOX_BINARY": "$(location @linux_beta_firefox//:firefox/firefox)",