Test CI encountering Firefox timeouts

[Jermolene]

Since early May, test runs on master were failing with a timeout on running the Firefox tests with Playwright. See https://github.com/TiddlyWiki/TiddlyWiki5/actions/runs/26937437662 for an example.

@saqimtiaz and I have experimented with increasing the timeout from 30 to 60 seconds which fixed the problem. We subsequently attempted a binary chop to figure out the point it was failing. 45 seconds fails again, suggesting that we have a minimum 50% performance regression.

This could be caused by problems with Playwright or Firefox; it definitely isn't caused by any commits we have made. @pmario I think you use Firefox have you noticed any performance regressions?

[pmario]

@Jermolene ... I did not see any performance regressions, other those where we have PRs. But they are neglectable.

[Jermolene]

Thanks @pmario