Ok, up till now when I've built Otter, it crashes on startup. Andy reported success with Dooble and not running acpi-daemon. Testing, the otter browser starts up and runs fairly well without acpi-daemon running. It is crashy, I tried this post in Otter and probably uploading the file crashed the browser.
Anyways, for testing purposes, here is today's build of the Otter browser from the main repository, no OS/2 patches yet, it runs surprisingly well considering. It is using the same webengine as Dooble-Qt5 so some pages will not display correctly.
Edit: fix the markup