I plan on uploading it there yes

Umbra doesn’t add any security flaws to firefox. Every security fix applied to firefox esr is also applied to Umbra.

I’m not super familiar with ironfox. Currently we’re only available on Linux/windows. We don’t use profiles at all.

I don’t like browsers phoning home, even when it’s convenient. You can import history/password from another browser.

Yeah it supports all firefox extensions. We kept the parts that don’t spy on you.