Sleeping tabs fade by default in Edge. Follow these steps if you don’t want it to fade:
Hit the three horizontal dots at the top right.
Click on Settings.
Click on System on the left sidebar.
You can find fading sleeping tabs in the Optimize Performance section. Please turn it off.
Note: If you want sleeping tabs to fade, turn on the “Fading sleeping tabs.”
I hope this guide, “How to Disable Fading Sleeping Tabs,” is helpful to you.
Thanks for reading.