A must-have, very useful and private oriented. I'd love an option for this extension to open the unshortened link on the fly by default.
And would be great to have this in Thunderbird as well.

Quo Vadis? is the only link-unshortening extension on AMO (that I know of) that does not send your URL to the developer's server or a third-party service for analysis. That makes it significantly faster and more private. It also has a better user interface than the others: Instead of opening an interstitial page with a link for you to click, and/or opening the final URL after checking against a blocklist, Quo Vadis? simply opens a popup in-page that shows you the redirect(s) and lets you decide whether the final URL is something you want to click on. Very well done.

Very insightful.

The last update made this perfect! Click on a FB or any other link and the ultimate URL is shown.

Even better, the link is live and the FB landing page is skipped. Yay!

If you do not have this extension, you are flying blind.