UnseenUgly Email alternatives for Gmail
Checked November 14, 2026. Written by the developer of Unseen, one of the options below.
Ugly Email was one of the best-known Gmail tracker blockers: open source, free, with an eye icon on every tracked email. Today its Chrome Web Store page no longer loads, and the Firefox version was last updated in March 2024. If it vanished from your Chrome toolbar, or you're looking for it and can't find it, this is why.
Still have it installed on Firefox?
It may keep working for a while, but Gmail changes its page often, and a blocker that isn't updated can stop catching trackers without telling you. You can check whether a particular email is tracked with the email tracker checker, then decide.
Alternatives that are open source like Ugly Email
| Extension | Price | License | Can access | Browsers |
|---|---|---|---|---|
| Unseen | Free; optional Pro $15 once | MIT | Gmail only | Chrome, Edge, Firefox |
| Trocker | Free | Apache-2.0 | All websites (to cover any webmail) | Chrome, Firefox |
Unseen
Ours. Like Ugly Email, it marks tracked emails, here with a note above the email naming the company (for example "Blocked 1 tracker: Mailchimp"), and keeps normal pictures. It blocks 330+ known tracker patterns plus hidden 1×1 images, using Gmail's original image addresses. It can only see Gmail, and makes no network requests of its own. Blocking is free for good; an optional Pro feature cleans tracked links for $15 once.
Add Unseen to Chrome, free Firefox · Source code
Trocker
Free, open source and maintained, with free link cleaning and support for Outlook.com and Yahoo Mail. It asks for access to all websites to do that. Pick Trocker if you use more than one webmail.
No extension
Gmail's "Ask before displaying external images" setting stops all pixel tracking, and hides all pictures until you click. How to turn it on.
Full comparison, including paid options · Which trackers Unseen blocks