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Firefox headless #3780

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jonalim opened this issue May 28, 2025 · 2 comments
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Firefox headless #3780

jonalim opened this issue May 28, 2025 · 2 comments
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can't reproduce We tried to see what you saw, but didn't duplicate The answer/solution already exists somewhere workaround exists You can reach your destination if you do this...

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@jonalim
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jonalim commented May 28, 2025

Attempting to run Firefox in headless mode doesn't work. The only workaround I've found is to set environment variable MOZ_HEADLESS=1. Similar in behavior to: #1813

pytest -k test_basics --headless --browser=firefox

yields: stack_trace.txt

$ firefox --version
Mozilla Firefox 138.0.4
@mdmintz mdmintz added duplicate The answer/solution already exists somewhere workaround exists You can reach your destination if you do this... can't reproduce We tried to see what you saw, but didn't labels May 28, 2025
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mdmintz commented May 28, 2025

Not able to reproduce this, but since setting the environment variable MOZ_HEADLESS=1 works for you, I would just use that.
You can also try: pytest --firefox-arg="-headless", as mentioned in #1813 (comment).

@mdmintz mdmintz closed this as completed May 28, 2025
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jonalim commented May 29, 2025

Not able to reproduce this, but since setting the environment variable MOZ_HEADLESS=1 works for you, I would just use that. You can also try: pytest --firefox-arg="-headless", as mentioned in #1813 (comment).

Thank you, that works too!

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