The popup menu is not annoying, but a useful thing. I also hate things that pop up. But this is different. The popup menu does not appear by itself. You set the rules for which event it will appear or not appear at all. For example, you can make your custom popup menu appear only if you hold down Control and highlight the text. And another when you hold Alt. And nothing when you just select the text.
Popup menus are very customizable. The whole point of my extension is to make everything inside the browser window in such a way that it is convenient for you.
Moreover, the extension has several types of popup menus that are less intrusive. For example, the Popup menu can be displayed at the very top and at the very bottom of the screen without distracting your attention.