This Extension is designed to convert obfuscated/nested links to genuine/normal plain clean links.
http://www.foobar.com/track=ftp://gnu.org ➠ ftp://gnu.org/
It also allows to remove affiliate/tracking tags from URLs by the use of configurable patterns, being the most common used ones defined by default (ie, UTM, AFF, REF, etc)
Further details on the AMO listing page:
If you want to help testing by installing Clean Links straight from this repo try this extension: