[userbinator]

every time they switch tabs

The whole idea is that when you have the window at a comfortable width, the content in all your other tabs should also be.

[square_usual]

... no? You can switch between YouTube, magazines and wikipeida in a browser. Most written content sites enforce max widths for their content, so you can switch to them in a maximised window in which you were watching youtube without having to resize your window. Wikipedia is an outlier in that, and for no good reason.