[CI] Run core specs on both, firefox and chrome browsers

[Sija]

No description provided.

[Sija]

@gdotdesign I see couple of ways how we can approach these 2 failing tests:

1. Fix the tests, so they'd succeed on chrome
2. Add an approach of running the tests conditionally - only/except on some browsers
3. Remove/Comment out the tests
4. Use continue-on-error: true and just ignore 'em

I'd lean towards option 1 if possible, and option 3 otherwise.

[gdotdesign]

I think we can remove those tests for now since the methods work just not in that context, after that we can try to create something that works in Chrome using maybe dispatchEvent.