test: set defaultBrowser to chrome

[MikeMcC399]

Situation

Cypress 16 plans to remove Electron as default browser with open plans for exact replacement options (see cypress-io/cypress#33524). Workflows that do not define a browser may fail.

Change

Chrome is the most used browser and is available in GitHub-hosted runners for each operating system.

For those examples that are not browser-specific add the Browsers configuration setting defaultBrowsers: chrome.

Remove tests that explicitly specify electron.

Follow-on actions

Prior to release of Cypress 16, documentation that refers to Electron being the default browser for Cypress will need updating.

---

Note

Low Risk
Low risk since this only adjusts Cypress example configs and CI test matrix; main impact is reduced browser coverage (Electron no longer exercised) and any implicit reliance on Electron defaults.

Overview
Sets defaultBrowser: 'chrome' across Cypress example cypress.config.js files so runs don’t depend on Electron being the implicit default.

Updates the example-docker GitHub Actions workflow matrix to stop running tests in electron, leaving chrome, edge, and firefox.

^{Written by Cursor Bugbot for commit 5ea7191. This will update automatically on new commits. Configure here.}

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[mschile]

Cypress 16 plans to remove Electron as default browser with no replacement

Just an fyi, I wouldn't say this is true. In fact I would say there is a high probability we will default the defaultBrowser setting in run mode to be either chrome or chrome-for-testing. The Electron removal PR is just the first step to remove Electron as a supported and default browser. That being said, adding the default here is fine.

[MikeMcC399]

@mschile

I've changed the text to make it more open to your exact migration plans, so thanks for your comments!

Setting the default here does make it independent of those plans though.

[github-actions]

🎉 This PR is included in version 7.1.9 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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