Wrong hill to die on, Visa and MasterCard are better networks for consumers than Lightning in most cases. There's no UX improvement to be had over a simple database that's already connected to the unit of account.

Your focused on solving the wrong problem.

Browser extensions are very dumb. Not only are they unable to be distributed where payments actually happen, they additive to friction, not subtractive.

The real problem to solve is in distributing Lightning to the edge-cases where it is actually better, areas where goods and services are extremely low margin races to the bottom and therefore the cost of finality is material. Examples such machine to machine payments like cloud services, privacy when buying smut content, permission-less earning, cross-border, etc etc etc.

Lightning adoption must happen in these areas before it's used for coffee, trying to disrupt plastic is a fool's errand that people have been after since Lightning was invented. We see this in the body trail of consumer wallets and the bastardization of those that remain into fake L2's.

If you want to explore actual solutions for those types of services, making Lightning the money of the web, reducing costs etc, see Lightning.Pub and CLINK