URL: www.nouvelobs.com
Browser / Version: Firefox Mobile Nightly 55.0a1 (2017-05-18)
Operating System: LG G4 (Android 5.1) - 1440 x 2560 pixels (~538 ppi pixel density)
Problem type: Something else - I'll add details below

Steps to Reproduce

1. Navigate to: http://m.nouvelobs.com/en-direct/a-chaud.html
2. Observe the Expand arrow.

Expected Behavior:
The Expand arrow is pointing downwards.

Actual Behavior:
The Expand arrow is pointing upwards.

Notes:

1. The issue is also reproducible on Firefox 52.0 Release (Mobile).
2. The issue is not reproducible on Chrome (Mobile) 58.0.3029.83.
3. Screen capture attached.

Watchers:
@softvision-oana-arbuzov
@softvision-sergiulogigan

sv; country: fr

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