Keep forgetting to log out of Google services before performing searches?

This simple userscript pops a warning when you're signed in to Google and are about to perform a search (or visit) www.google.com(.*) or www.youtube.com(.*)

Note: The script specifically excludes www.google.com/recaptcha/ to prevent issues with recapture codes (annoyingly) used on many websites.

Screenshot:

Also available at:

• OpenUserJS
• GreasyFork
• Github

(But check the version there is up to date!)