That wasn't so much sarcasm as dry english self-deprecation in this case. I have a couple friends who do accessibility stuff who I ask for advice when I need it

That wasn't so much sarcasm as dry english self-deprecation in this case. I have a couple friends who do accessibility stuff who I ask for advice when I need it and are always happy to give such - that's part of where my motivation to spitball comes from cos I know they'd appreciate it as a paying it forwards sort of thing (once in person conferences return properly 'buying them beer' will also work, of course ;). Yeah, this is where I was thinking client-server, wherein the reader would (in pipedream world) send some sort of request through to the other end to move between UI elements ... but (a) that requires said protocol to exist (b) we're back to attack surface problems. Though ... I wonder if, rather than trying to put together all-of-a-chromium, you could do something with a seriously locked down build based on the tauri project (which I think it was you mentioned upthread somewhere and I'm now going "ooh" at) but I'm aware I'm handwaving a lot there.