Not possible for more than one plugin to listen to before:browser:launch event

[kpturner]

Current behavior

We have two plugins that both perform functionality on the before:browser:launch event.

Previously both plugins worked as expected - I believe in version 9 at least.

We have now found that one of the plugins no longer works. It seems that if two or more listeners are attached to the before:browser:launch event, only the last listener attached actually fires/does anything.

Desired behavior

It should be possible to add as many listeners as you like to this event.

Test code to reproduce

https://github.com/kpturner/cypress-bug-repro

Cypress Version

10.6.0

Node version

16

Operating System

Mac Big Sur

Debug Logs

No response

Other

No response

[lmiller1990]

I think we clobber the previous one here https://github.com/cypress-io/cypress/blob/develop/packages/data-context/src/data/EventRegistrar.ts#L40

For reference, originally discussed here: #23465

[emilyrohrbough]

Duplicate of: #22428