The only icons I can see on the right hand side of my toolbar is the NoScript icon, along with the Save to Pocket, FF Account, Extensions and hamburger buttons. I should have about 12. I just installed a new system, launched FF and set it up to sync with my account. Everything else appears to run fine - passwords, history, etc. The Tree Style Tab works fine too. I have double checked the other solutions I found here, such as private viewing options, or trying to find the icons in the customize screen, but that's not the issue. My other FF instances on other machines are still fine. I just updated FF on this problem machine to 115.0.2 but no joy.