Description

In a E2E room with a friend that has long history, hovering over thumbnails of images I send them freezes Firefox and causes 100% CPU of the firefox process

Steps to reproduce

• Have room with long history (I tried a new E2E room with a dummy account with no history and was unable to reproduce)
• Send images
• Hover over the image preview thumbnail
• firefox process will have 100% CPU usage

I also tried the same with Riot Desktop on my OS X machine (10.11.6) and was unable to reproduce

Version information

• Platform: web

For the web app:

• Browser: Firefox 59.0.2
• OS: Void Linux
• URL: riot.im/app