I have a Notebook, HP 240 G7, with Manjaro 20.0.3, Lysia, with KDE Plasma.
How can I make my windows manager looks like in my Windows SO. For example having the hide, maximize and minimize buttons in the same line as the tabs in my browser, and not have the titlebar on top of my screen? That way the interface would like much cleaner and to take advantage of the space. I know there is a: No border option. But it doesn't show this buttons and I have to do it every time I open my browser.

I'm not sure you can do what you want, especially as regards putting window buttons on the same line as the tabs.

The only suggestion I can come up with is to look at some of the themes available for KDE Plasma; there might be some that approximates the effects you desire. You also might check whether your browser offers add-ons and extensions that might provide those options, but I will not offer much hope.

Another alternative is to check out some of those distros that try to look like Windows.

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Your question isn't clear to me, but I think you're talking about "Window Decorations"? (This refers *only* to your bit about 'not having the titlebar on top'. I know nothing about the rest, as I'm not even sure what Windows looks like these days.)

If you are, you can probably disable them entirely - or on a per-application setting. I recently was looking into doing exactly that and I discovered it'd take quite a bit of time and decided to not invest the time. In my case, it is an LXDE w/OpenBox configuration file that'd be edited.

Hold on, my notes say it was "/home/kgiii/.config/openbox/lubuntu-rc.xml" that needed editing.

So, put those together and a search engine may yield something. I made it as far as disabling them all, not liking it, and then deciding it wasn't worth the time to enable them (or disable them) on a per-application setting.

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