This really shouldn't be needed, companies should have proper telemetry/logging/access logs already.

If customer reports a bug (scenario/timestamp/user), company should be able to solve the issue.

Better yet, customer shouldn't really need to raise the bug, it should already be flagged by monitoring tools running on data above.

Cool project! (Side note: "magic links" made me think of passwordless / email magic link authentication)

How would you compare this to session replay products? Is the main difference that you do it on-demand, vs. for all/sampled traffic?

I was really intrigued by the title but "without installing anything" means "installing an extension" or not?

Shouldn’t it run continuously for my QA and devs?

browserstack's free extension can do this.