Try getting page content with both headers

Library/Homebrew/livecheck/strategy.rb

@@ -179,17 +179,14 @@ module Homebrew
       def self.page_content(url)
         original_url = url
 
+        stderr = nil
+        [:default, :browser].each do |user_agent|
           stdout, stderr, status = curl_with_workarounds(
             *PAGE_CONTENT_CURL_ARGS, url,
-          **DEFAULT_CURL_OPTIONS
+            **DEFAULT_CURL_OPTIONS,
+            user_agent: user_agent
           )
-
-        unless status.success?
-          /^(?<error_msg>curl: \(\d+\) .+)/ =~ stderr
-          return {
-            messages: [error_msg.presence || "cURL failed without an error"],
-          }
-        end
+          next unless status.success?
 
           # stdout contains the header information followed by the page content.
           # We use #scrub here to avoid "invalid byte sequence in UTF-8" errors.
@@ -218,7 +215,13 @@ module Homebrew
 
           data = { content: output }
           data[:final_url] = final_url if final_url.present? && final_url != original_url
-        data
+          return data
+        end
+
+        /^(?<error_msg>curl: \(\d+\) .+)/ =~ stderr
+        {
+          messages: [error_msg.presence || "cURL failed without an error"],
+        }
       end
     end
   end