Ugly Email tells you which of your emails are being tracked before you open them
You may not know, but there are now email-tracking tools that make it easy for people to see when you open an email, what you click, and where you're located. To fight these, the Ugly Email Chrome extension (on Firefox soon) shows you when your emails in Gmail are being tracked. And it starts working before you click anything. Once Ugly Email is installed, a little eye symbol appears next to any email in your inbox that's being tracked.
Get it here.
Does it really work? Did I made a mistake??