Comment by jefftk

Not writing the feature makes sense, but pushing Firefox and Safari to add support would be pro-social if you're up for it. The most common reason for browsers not to add support is something like "this can be done in other ways, and it has maintainability/security/bloat downsides". Running into a feature you can't build is evidence on the "this can be done in other ways" question (but of course the other downsides could still be big enough that it's not worth doing).