Keep Current Window On Top As New One Loads?

Okay I'm sure other people have had this problem also if they are constantly opening new windows while trying to work in the current one. It finally pissed me off to the point of posting for an answer to this problem. First of all I hate tabbed browsing cuz I like the benefits that come with just opening a new window to browse in- alt+tabbing, being able to use them side by side or whatever else.

But anyways so I'll be browsing online in one window, maybe filling out some form and then for whatever reason I'll need to open a second window so I'll open it and quickly click back into the window I was filling stuff out in, but the new window that I opened will pop up on top of the current window I'm using (filling out a form in) after it's done loading, causing me to have to minimize it/click back into the window I was using. Sometimes I'll only have to click on the current window once to stay in it when the new window loads, but other times I'll have to click maybe 3 times because the stupid new window hasn't finished loading and keeps popping up on top of the current one I'm using.