Is there any way to set a browser (preferably Edge) so that one click will immediately load 5 different websites at once? The 5 I need to load will be the same each time, but I need to load them all very fast to qualify for flash offers. Keeping them all loaded all the time is not possible because then I get kicked out.
I’ve been thinking about this for weeks,but the act of asking the question leads me to immediately come up with the solution myself 
just create a folder with all 5 bookmarks, then you can right click the folder and “open all”
If you add the sites to a favorites folder, you can then right click on the folder and there should be an option to open all of them at once.
EDIT Wow, ninja’d by the topic starter
Open all 5 sites, go to settings, select homepage option then select “use current”
Works for me in Chrome.
You can also use collections.
This is what I do; I have a folder called “morning” containing the various newspaper sites I want to read over breakfast and it lets me open all of them at once.
There is an “easy”** way, which involves creating a custom page and a splash of javascript to convert your click into opening your five specific pages. It will work for all browsers.
I’ve written something a bit similar in the past.
** easy in that it’s a remarkably short bit of script.
I use a plugin called “Open Multiple URLs”. Works great. (I know this also exists for Firefox…not sure about Edge).
It seems Edge has something similar:
Not sure if this remotely applies, but when Woot would put up their Bag Of Crap (basically a flash sale), often times they’d have one website that would randomly put up a code and then you’d have to type it into another site, and check out.
The trick a lot of us did was to use two separate windows side by side. One window you would contentiously refresh watching for the code, the other you’d have logged into their (woot) site and from time to time, I’d log out and log back to make sure I didn’t lose any time if it logged me out after a few minutes.
Pin the websites