FIX: handle unexpected errors when browsing web (#1314)

Author: SamSaffron

lib/personas/tools/web_browser.rb

@@ -44,6 +44,9 @@ def invoke
             end
           end
 
+          { url: url, error: "Failed to retrieve the web page" }
+        rescue StandardError
+          # keeping information opaque for now just in case
           { url: url, error: "Failed to retrieve the web page" }
         end