On: Chrome will aggressively throttle background tabs

[benologist]

Iframe them onto one page and make the browser window huge. Something like:

    <iframe src="the url" width="50%" height="50%">
    <iframe src="the url" width="50%" height="50%">
    <iframe src="the url" width="50%" height="50%">
    <iframe src="the url" width="50%" height="50%">

There's also the <frameset> and <frame> tags to divide pages between URLs.