URLs often have lots of referral and tracking information in them (see anything with UTM parameters: https://en.wikipedia.org/wiki/UTM_parameters ). I use the Neat URL extension and it's been great.

Right, I hate that, and suspected this addresses the practice.

These days I like https://addons.mozilla.org/en-US/firefox/addon/neat-url/ , it's pretty sane and exhaustive by default

How does that compare to CleanURLs https://addons.mozilla.org/en-US/firefox/addon/clearurls/ I only ever used CleanURLs, but I have seen Neat URL mentioned.

I rather like Clean URLs (seems more maintained) and can pull a set of rules (regxp) from https://gitlab.com/KevinRoebert/ClearUrls/raw/master/data/da...

I installed link cleaner¹ at some point, but can't vouch for it.

¹ https://github.com/idlewan/link_cleaner