>>>> browsers makers need to ensure their security UX helps people understand what they're connecting to
>>> But, didn't browser vendors do that
>> No, browser vendors have not tested verification markers that are consistent with other platforms.
> That's not what I asked, that's a straw man.
Doesn't seem like much of a straw man to me. Investigating whether browser security UX helps people understand what they're connecting to logically includes looking at designs other than the current one.
> then perhaps that's where the CAs should start their research.
Yes. And browsers too.