Some time ago Mozilla decided that tabs had to be on top.
I still know where I want my tabs, and it still disturbs me that the tabs are in the wrong place.
I have just spent a peaceful retro hour or so browsing with Palemoon. Tabs in the right spot and coloured icons to ease the stress on my ageing eyes.
Just like SeaMonkey.
Why do "UX experts" these days have to constantly keep reminding us older folk that we cannot have what we need?