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I tweaked some of my Firefox about:config settings, now stackoverflow.com froze because some JS file takes too long to begin downloading

I've just finished my personal Firefox tweaks that taken 5 different user.js as references. But when I visited stackoverflow.com:

  • Some of the elements are rendered then froze, I can't click on anything: initial render

  • After 2 to 3 seconds then the loading is completed: finish render

My investigation using DevTools > Network: There are some JS file takes a lot of time to start downloading:

Here is my user.js file, I have added a ToC for easier navigation:

https://gist.github.com/Silverbullet069/a4b51d7cfe34ea51853fe71f4f719c2e

Anyone have this same issues after tweaking and found the cause? Please shed some light for me, I can't stand of waiting 3 seconds to read a SOF answer :v

Solution

  • It's the Dark Reader :v I do a Safe Mode reset with user.js applied and everything back to normal => An extension is doing nasty things to my browser. I changed it v5 and let it auto-detect dark mode on-site and disable itself if found.