This add-on seems to work (Firefox-ESR 140) but no longer be maintained:
- On Mozilla / Add-ons / ClearURLs
- "Last updated 2 years ago (Feb 5, 2025)"
- "Write us... If have any suggestions or complaints, please contact us on GitHub." (with link to issue list)
- On GitHub / ClearURLs / issue list
- "New issue" cannot be clicked (has no hyperlink) and its tooltip says "Issue creation is restricted in this repository". So, cannot add a new issue on GitHub … Ok, let's search more on GitHub.
- On GitHub / ClearURLs
- "If you have any suggestions or complaints, please create an issue." (with link to GitLab, not GitHub 😫)
- "[…] or email us rules.support (at) clearurls.xyz (this mail will automatically create a new issue in this repo)"
- On GitLab
- GitLab allows to create a free account, but you must give a bank account (but yeah, trust'em, it's free 😏) and a phone number. A no-solution for me.
- An e-mail sent to "rules.support (at) clearurls.xyz" gets a response "A message that you sent has not yet been delivered to one or more of its recipients after more than 72 hours". Let's try elsewhere, there must be a solution.
- On the homepage (clearurls.xyz)
- "Last update: February 5, 2025"
- No contact page linked. No site map to find where it can be.

Nope, I've run out of solutions.

So basically, good in the current state of the web (2025~6) but as more time passes, the worse this add-on will be.