is there a way to make launchers / browsers optional? an "automatic" setting?

[jokeyrhyme]

I have a use case where we have multiple developers on multiple platforms, and the full set of browsers is not available on any single machine. For example, we have Windows machines that have IE but not Safari, and we have OSX machines that have Safari but not IE.

Rather than limit testing to cross-platform browsers (Chrome and Firefox), it would be terrific if I could specify that I want any and all available browsers / launchers to be used, but to only trigger a warning instead of an error when some of them are missing.

Our CI will then be able to test in a set of browsers, and each developer will be testing in other (overlapping) sets of browsers, all with one hopefully simple configuration.

Any ideas? Is there a plugin that achieves this? Is this a horrible approach?

[jokeyrhyme]

For example, maybe a onBrowserMissing: "error" that I can change to "warning"?
Or maybe an optionalBrowsers: [] setting I can set to [ "Safari", "IE" ]?

[jokeyrhyme]

Nevermind, I found this: https://www.npmjs.com/package/karma-detect-browsers