Just in case this suggestion from quite a long time ago by more than a few people at that time has gotten lost ....
I'm finding more and more that it would be so much easier to check codes and grab codes etc. from other pages if we could open more than one at a time. It's very hard to compare things when you have to switch back and forth constantly with opening them where as having them already open is so much quicker. Not to mention there are many times I'd like to edit things on multiple pages that aren't linked together, but similar etc.
There's also the complication of having so many pages (30+) that you have to constantly scroll up and down the list to get to the pages you want to reopen, over, and over, and .... you get the idea I'm sure.
Just my 10 cents on the subject, but it was suggested a long time ago, and seems it's gotten lost in the process. Hopefully this is something we can look forward too in a not too future update.