<html> <head> <meta content="0;URL=/bitrix/admin/index.php" http-equiv="REFRESH"> </head> <body> </body> </html>
You can type viewhtmlonline.com in front of any url you're browsing and it will show you the source.
viewhtmlonline.com
For example: viewhtmlonline.com/https://temp.cool
viewhtmlonline.com/https://temp.cool