[Bug]: trace-viewer tests don't work with `FFPATH` on tip-of-tree

[aslushnikov]

🚀 Feature Request

On tip-of-tree, the following works:

npm run ftest -- --grep 'should show empty trace viewer'

However, if we provide FFPATH env variable, that points to the default Firefox browser:

export FFPATH=$(node -e "console.log(require('playwright').firefox.executablePath())")

Then this command no longer fails:

npm run ftest -- --grep 'should show empty trace viewer'

For some reason it Traceviewer test fixture's code playwright.chromium.launch() launches Firefox instance with chromium arguments.

I bisected this down to 0be34e5

Example

No response

Motivation