Mozilla is testing a new Firefox Nightly feature called Mini Window that lets users pop an entire webpage into a small, always-on-top window stripped of most browser controls. "The idea behind the Firefox Mini Window feature is simple: allow users to move a currently open tab (or a section of a tab) into a separate mini window," writes ZDNet's Jack Wallen. "Think of it as moving a tab from one window to what appears like a web app." From the report: At first blush, there's no address bar, controls, scroll bar, or anything else that would normally be associated with Firefox. The Mini Window appears to be a web app, without having to actually create it. However, when I hover my cursor inside the Mini Window, I do see the address bar, the back/forward/reload buttons, and the window close button -- and that's it. The browser gets out of your way, so the only thing I see is the content. On top of that (pun intended), the Mini Window stays on top of other Firefox windows, so I can have that popped-out content always in focus while I work on other things. This feature comes in handy when I'm working with limited display space (say, on a laptop) and need to reference a page while working on another. For multitasking, it comes in very handy. [...] Let's say I'm writing a paper on Linux and need to read a particular article for background information. I could have my document open in the main window, and then open the article in question in a Mini Window. I could then reference the article without having to click back and forth between them -- even when working on a smaller display. Here's another use case I've found: When using MacOS's Stage Manager feature, I only have one window available at a time. The Mini Window bypasses that limitation, so I can have my main browser window focused as well as the page open in the Mini Window. Another handy way I like to use Mini Window is to open a favorite search engine, move it to a Mini Window, and then I have an always-ready search tool at my fingertips. I could also open my favorite AI service and use it in the same way.Read more of this story at Slashdot.