Was LibreJS 7.0 released without testing?

I just installed LibreJS 7.0 in ABrowser on Trisquel 7 (did an apt-get update and upgrade before I installed it). I had a few browser tabs open when I installed it. I closed most of them, but tried to pin a couple of them, so they would open again after I restarted. The whole thing locked up, and I had to kill -9 to close the browser.

After I re-started the browser, nothing worked, and I had to kill -9 again. Then next time I re-started, I quickly closed the pinned tabs before they loaded. Again, had to kill -9. ABrowser opened with a fresh tab. As soon as I tried to navigate to a site using JS (Quitter.se), the whole things slowed to a crawl, then locked up again, kill -9. This time when I restarted, I just went straight to the add-ons manager and uninstalled LibreJS. Bug fixed.

Is the FSF recommending that average users run LibreJS to protect their freedom from proprietary JS? Because if so, they're really damaging their credibility. This add-on catastrophically crashes the default browser on the libre GNU-Linux distro that the FSF use in their own offices (AFAIK). I can only imagine what havoc it would cause if some average user installed it on FireFox on another distro, let alone on another OS.

What's going on here people?