### Summary Navigating to almost any project/group/etc page on gitlab.org re-opens the left sidebar, only on Firefox for Android (stable, beta, and nightly). I have only tested with my Nexus 6P (Android Oreo). ### Steps to reproduce 1. Use Firefox for Android 1. Navigate to a Group or Project page ### Example Project Any. ### What is the current *bug* behavior? Sidebar is open on every click, creating a poor user experience doing non-sidebar tasks. ### What is the expected *correct* behavior? Sidebar is closed by default while navigating groups/projects. ### Relevant logs and/or screenshots   ### Output of checks This bug happens on GitLab.com