Are you kidding? I'm willing to bet 99% of users run their browsers fullscreen.
Using the drag-and-drop feature that splits the screen between two GUIs already marks the office power user, a third windows on a single screen brings us into the territory of the hardcore nerds running tiling window managers.
99% of the folks I interact with usually just use whatever size the browser opens in initially, then maybe resize it if they're reading for a while, or need to see more info. If half a pic shows up, they might try to fumble to grab a handle to resize to see more of the pic; sometimes it works, sometimes they end up giving up.
Going 'full screen' may be different than just 'as wide and tall as the monitor', because 'full screen' mode gets rid of the window chrome, which causes confusion.
The only folks I know who consistently use browsers 'full screen' are on mobile devices where that's generally the only option.
I have a 27" widescreen. The idea of maximizing a browser window is absurdity. My monitor can comfortably show three websites side by side. The amount of wasted white space on a full screen website would approach 90%.
Here's this very post fullscreened (without a taskbar). What a wild waste of space and the content is clearly not designed to be viewed like this, with the UX being located at the top left lol.
What does having 60% of my screen be purple do for me? Why would you choose that?
Honestly, man I don't care for this conversation. You do you bae. I was merely offering an observation of what I've seen from people and you're not even talking about that.
I have no idea what the statistics are, but I certainly never run the browser fullscreen and I rarely see others do so.
Do you mean maximized? I might agree if you do. I almost never see browsers full screen except when playing videos.
I've never had my browser in fullscreen unless it's media content.
I too prefer tabs at top than to the side, as I have four screens, 2x32' and 2x27' -- having the tabs at the top of my top screen feels more natural.
The only time I run an app without fullscreen-ing it is if I don't have to do much in it or it doesn't have enough content to use up all the space anyways. Like system settings. Otherwise, I am using the app -> I am focusing on it -> I want it to take all the space it wants and show me everything going on inside it. My browser and my text editor are apps where I spend 99% of my time so they are always full screen.
javascript:var%20b=document.documentElement;b.style.width='900px';b.style.marginLeft='auto';b.style.marginRight='auto';void(0)
(I've never had overlapping windows in my life -- I find seeing more than one thing super distracting and it annoys me that this seems to be the default on Macs)
The only thing it's not really good for is the email client, video, and pictures. For those I have another monitor in the standard landscape configuration.
I suppose just as wide 16:9 display would have been even nicer, but it's fine. There are some benefits in window placement in having just a single screen, even if window managers could work better for this use (e.g. have a "second screen" region where there are separate workspaces).
The Firefox and Edge implementations have a collapsible panel for the vertical tabs. I agree if they didn't, it would be worse than horizontal tabs.
However, my pet peeve is that it's now impossible to disable tabs altogether, say when using a tiling WM that implements tabbing itself, controllable with the usual shortcuts. Firefox has an extension that always moves tabs to a separate window, but it's janky.
And unless you have a browser full of tabs, vertical tab lists usually have massive amounts of purely wasted white space and are generally much less space efficient overall.
Every once in a while I wouldn't mind for a specific window to have vertical tabs with nested tabs, as a psuedo live-bookmark organization system for a current project. But it's not a daily driver for me.