Run Cypress tests on Safari and Firefox

[haakemon]

Description

Currently our Cypress tests are only run on Chrome. To ensure apps work in other browsers, we should run tests on the most common browsers, Chrome, Firefox and Safari.

We recently had an incident where apps were broken on Safari browsers: https://github.com/Altinn/app-frontend-react/issues/312

Additional Information

Cypress doesnt actually have support for Safari yet (current supported browsers, github issue for Safari support), so we need to figure out a way to work around this. Some options:

• Write some smoke tests in a different framework for Safari
• Investigate if there are some adapters that can be used to run tests written in cypress on another framework (perhaps https://github.com/vladlearns/cypress-playwright can be used?)

Tasks

No response

Acceptance Criterias

• [ ] End2End tests are run on Safari as part of Github workflow
• [ ] End2End tests are run on Chrome as part of Github workflow
• [ ] End2End tests are run on Firefox as part of Github workflow

[olemartinorg]

I just created a new issue for a (huge effort) pipe dream I have. I do think, if we pull that off, we won't need this change all that much. I guess we could continue working on our current cypress tests to exhaustively test specific functionality, while the broad-strokes happy-path tests in the issue I mentioned could make sure most things continue to work cross-browser for every new frontend release.