User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:35.0) Gecko/20100101 Firefox/35.0 Build ID: 20150122214805 Steps to reproduce: Opened http://danielstern.ca/range.css/ in latest Fennec Nightly. Actual results: Page renders fine, range input/slider switcher dropdown works fine as well - but the custom sliders are practically unusable, they can't be dragged, they barely react to any interaction - but with a delay. The main thread seems blocked as scroll does seem to work afterwards, but lower portions of the page remain unrendered/draft rendered only. Expected results: Page should remain working fine, sliders should react to dragging smoothly.
OS: Windows 7 → Android
Hardware: x86_64 → ARM
Thanks for reporting this. I tested the issue with Nexus 6P (Android 8.1.0) and LG G4 (Android 6.0.0) on latest Nightly and Release and I could reproduce it following next steps: 1. Go on http://danielstern.ca/range.css/ 2. Drag the custom sliders. On Chrome seems to be easier to drag the sliders, also on Beta 62.0b5 Please watch the video to understand easier the issue. Behavior Chrome - https://drive.google.com/open?id=1Y5WVF5qBdLAholgBfpg8g9SilQKbP7zJ Behavior Nightly - https://drive.google.com/open?id=1e8gfRI66M_P1CxKP3fkAMm-aAshF9P4O
Status: UNCONFIRMED → NEW
status-firefox63: --- → affected
Ever confirmed: true
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