Earlier quoted context omitted.
> Brave already prohibits cookie and data bleed-over from one domain to another. Is that similar to First Party Isolation in Firefox?
I suspect so, but don't know the details of FPI in Firefox. We don't permit cookies and storage access by third-parties, while also blocking known bad-actors entirely. We also "farble" APIs to create noise for those who do have access. If there are any specific scenarios or questions you have in mind, I'd be happy to discuss further.
Does this effectively do the same as the 'Canvasblocker' extension does for Firefox?