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From my experience most teams only test against a single browser, yes. It's however nice to have the option to switch to another browser when debugging a browse

From my experience most teams only test against a single browser, yes. It's however nice to have the option to switch to another browser when debugging a browser-specific bug. From what I've seen in practice, for a lot of teams and projects, running tests concurrently across multiple browsers isn't easy as you claim. Once you have a database involved and not a perfectly clean setup, concurrent testing can become a hassle and is rarely worth the effort of fixing.

bsimpson 9y ago
It's also quite easy to run Chrome and/or Firefox for free in CircleCI or TravisCI. Safari and Edge are non-trivial to test in those environments. (I think you can get Safari if you tell CircleCI you're an iOS app and hack your way over to Safari from there, but I don't know if you can even test Edge in the popular CI stacks.)