@leocg I actually looked at the page, and it does say that, and you haven't responded to my other topic I made about an Opera glitch. I might just report you for being unhelpful to me, and others.

Did you watch the video? It shows that sometimes the tab glitches out and the "X" button doesn't appear.
Click the Google Drive link and watch the video.

I have no idea why, but on my computer when I make a new tab, there is a chance the "X" button on tabs disappear, and I have to move away my mouse cursor, and move it back again for it to re-appear.

Here's a video of what's happening:

If the embed isn't working:
https://drive.google.com/file/d/1HT4iIQD9tz0XEvavD4Aj9gqd3dQ7hzdS/view?usp=sharing