Whatever is still going on after the proprietary fork doesn’t count. It is irrelevant, just some other payware that will enshittify as it is resold. The last canon version is the unburden foss version. For practical purpose the development ended there and it’s fine. It’s great it made it that far before dying. At least tgat version won’t backslide in functionality or won’t leverage it’s adoption to extract rent.
Is that web software not html5 compliant ?