Vlad lew Hm I am not able to reproduce it (but I do not have as large screen right now). Can you post a higher resolution photo?
ofwfwoo88 Vlad Orion (the second and the last tabs are slightly blurry compared to the others two): Safari (every tab looks normal):
ofwfwoo88 Vlad I'm on Big Sur 11.6.7 and Orion 0.99.116-beta. As I said I have a non-retina 1366x768 display.