web.whatsapp.com - slow performance while using site

[eeeple]

URL: https://web.whatsapp.com
Browser / Version: Firefox 54.0
Operating System: Windows 7
Problem type: Something else - I'll add details below

Steps to Reproduce

1. Navigate to: https://web/whatsapp.com

Expected Behavior:
Smooth navigation
Actual Behavior:
Almost unusable. Extremely slow, and bogs down all firefox tabs.

From webcompat.com with ❤️

[MDTsai]

I'm not able to reproduce this issue using Firefox 54 on Linux. May need someone help to test.

[eeeple]

I can run traces and potentially a profiler if needs be. I just need instructions on how-to.

[eeeple]

Here is an example of slow performance. Hope this helps.
web.whatsapp.com performance.json.zip

[adamopenweb]

There's been a few reports of this lately, #7458 being one of them. I haven't noticed any severe issues with it myself.

[eeeple]

Oh sorry, I didn't see that ticket. Closing this one, then. Thanks for the help !