Tile Tabs WE

This app needs some work. Great idea, confusing execution. I have a four monitor setup where I'm switching between monitors a bit. I got this addon so I can keep a browser on my 2k monitor for media playback while I have a browser on one of my 1080 monitors for other stuff so I can read etc and watch stuff without having to navigate a bunch of tabs in a single browser when I want to change videos. Initially Tile Tabs seems great. When you open Firefox it can automatically recall the windows if you have your settings right. I accomplished this a few times when initially testing it. Issues arise quickly past that. It seems that closing one window can close all windows created by the addon. This is frustrating because in my use case I already had my original browser window open, and the addon would bring up two windows, so I basically had to move all my tabs from my old window to the two new ones. Closing either window seemed to close both of them. I saved a layout - exactly as described above, one window with media playback and one with other web pages like articles etc. - and set it to save tabs as well. I have a TV I switch to at night to play videos in bed, and since at that point it's just one screen I figured I should be able to close the text window and keep open the media playback one so I'm not juggling a bunch of windows. Contrary to what I described above, it somehow let me close one of the windows. I remember testing the layout and bringing the other window back up with tabs intact. But when I got out of bed this morning and tried to bring up the window I closed yesterday it's just gone. I tried to reload my layout and it brings up blank windows, no tabs saved. Firefox doesn't have it saved as a "previously closed window". I closed out Firefox and reopened it (I have my layout set as default) and sure enough it brought up this current window as well as two empty windows. Whatever I had open on that browser window is just gone now. All I did was split tabs between the windows this addon gave me, saved it as a layout with the option to save tabs selected, closed one of the windows for a few hours, then clicked the icon to load my saved layout. Quick menu icon in top left of web page disappeared at some point and idk how to bring it back. This is an addon that I would really like to play with and see if I can get it to work how I want but I also don't want to risk losing a whole window's worth of tabs again. If I missed something then there needs to be clearer instruction within the addon.