Web UI broken in palemoon

Something has changed in the last week such that the web UI on gitlab.com is now unusable in palemoon.

On my main page at Pete Houston · GitLab the drop-down “Menu” in the top nav doesn’t drop down, there is no avatar, my activity and repos are entirely absent - it’s just really badly broken.

I am running the latest palemoon (29.2.1).

Whatever you have changed in the past week in terms of the Web UI, please change it back or fix it as the site is presently unusable.

See attached image showing the console errors and the page with missing elements.