URL: https://m.fr.aliexpress.com/categoryList.htm?spm=a2g0n.home.home-category.4.5mUyxV&cateId=0
Browser / Version: Firefox Mobile Nightly 55.0a1 (2017-05-11)
Operating System: Nexus 5 (Android 6.0.1) - Resolution 1080 x 1920 pixels (~445 ppi pixel density)
Problem type: Mobile site is not usable

Steps to Reproduce

1. Navigate to: https://m.fr.aliexpress.com/categoryList.htm?spm=a2g0n.home.home-category.4.5mUyxV&cateId=0
2. Tap “More” button and observe behavior.

Expected Behavior:
Drop-down menu is displayed with the options “Maison” (“Home”) and “Liste d’envies” (“Wishlist”).

Actual Behavior:
Nothing happens, drop-down menu is not displayed.

Note:

1. Reproducible on Firefox 53.0.2 Release
2. Not reproducible on Chrome (Mobile) 58.0.3029.83.
3. Debug:
   ReferenceError: event is not defined[Learn More] package.b2cdd300.js%20line%202%20%3E%20Function:4:1 Strict-Transport-Security: The site specified a header that could not be parsed successfully.[Learn More] log
4. Screenshot attached.

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

sv; country: fr

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