@jessamyn
MS Edge?

Last time Ars updated, you had to turn off both Copilot, and the then-revealed sidebar button, in order to get the Edge main menu button to appear in the corner, like it should do.
https://arstechnica.com/gadgets/2025/11/what-i-do-to-clean-up-a-clean-install-of-windows-11-23h2-and-edge/

I don't remember having to turn off the sidebar last week though, only Copilot.