Pills have their place, but it’s not in normal, day to day buttons and frequently used UI elements.

Edit: Holy shit I just got the new Firefox update and they pilled fucking everything. It looks horrible.why can’t they just leave things alone?

IMO pills can work when used sparingly. Here is a system I’m building that uses pills as visual control elements. This is a screen that the user won’t interact with very much, but when they do, it’s important. More frequently the user will just view this screen to understand which user role has which permissions. The pill controls are directly clickable and cycle between three states when clicked. The design keeps a good separation between these important controls, makes them easy to cycle, makes any state change very readily apparent, and is understandable at a glance for any person just reading the screen. The Delete buttons, a different kind of important, are made distinct by their shape and have a confirmation stage. This is the design I settled on, that I think is a happy middle ground between readability, ease of control, understandability and reduction of redundant text and labels.

What Firefox did is an abomination.