I'd like to reload/refresh all my open/visible browser windows at once. Ideally I'm looking for one keyboard shortcut, or something like the existing contextual menu for reloading all tabs in a browser window but for windows instead.
While I'm developing a website, I like to have one browser window open for each of mobile, tablet, desktop, and (sometimes) large desktop. Each window is appropriately sized for the target device. I use Safari. Right now I reload with command-r and rotate windows with command-tilde.
The whole process for 4 windows is about like this:
reload, rotate, rotate, (rotate, rotate, etc. web inspector and other browser windows)
reload, rotate, rotate, rotate (rotate, rotate, etc. through other... )
I'll not likely install a browser extension to do this. I hope a popular browser already has this as a built in feature. I would try out something like an automator action if no browsers have the feature built in.