So, nothing auto-downloads, nothing happens when I 'click' the link, top right. I retry several times and eventually get the .pkg file and install Brave.
The error message I posted at the start of this thread is from within Brave, at the final stage of installation of the Metamask extension, which was from Google Play.
However, as I now have the Metamask extension downloaded, installed and setup, I can't recreate it's download page from Google Play as the wallet link in Brave now simply opens the wallet, and not the first time install Google Play download page. And, I'm sorry, but I am not uninstalling the Metamask extension just for a screen shot for the purpose of this thread . But this is the equivalent page, but for the Brave mobile app.(sorry, but I can't be bothered opening-up Google Play just for a screen shot of the actual Metamask link. Trust me, they are the same looking pages. Different products, but the same download source).
The critical thing here, for me, is the message ~"this software needs to be updated, contact the developer".
Is that the OS, Browser or Extension developer? Which company's product is generating this error message?
My point from the start has been, if this was a Safari extension, I could have been getting one-on-one technical advice direct from Apple via the phone with someone who has my computer's entire history, from manufacture to last OS update, simply by giving then my laptop's serial number. And there would be no buck passing, Apple would take full responsibility and just solve the issue.
As described above, realistically, I hadn't even finished setting-up the Brave/Metamask browser combo before I was 'stuck' and had three different companies involved as the potential source of the problem. Forget about trying more alternative Browsers, I have a life to live.
As I have said before, throw in Microsoft's stuff and Android, and I cannot for the life of me understand why anyone would sign-up for this eco-system.
Nothing elitist, fanboy are any other derogatory jibe about it, it just works, and every time in my experience.
As usual Ink, thanks for your interest and let me know if you work out the error message source. I'm intrigued.
Cheers.
(P.S. FYI, I can confirm the Brave version info panel example you provided is identical to mine, including release number, thanks).