Anybody in the !fediverse using #Firefox that noticed that the update to v57, aka Firefox Quantum has left them without a #YOURLS plugin, I put together a temporary fix while waiting for the original maintainer to return from the void. It doesn't have all of the same functionality as the original, but it gets the job done in the meantime. You can get an xpi signed by Mozilla at the repo.

https://0eq2.com/J8
 !foss !fs