This is something what i missed from chromium. but can you make it support maximize window modes? And also, where is github page for this one? perhaps issue tab is better for these kind of questions.

Love the app. I would love to see this have a feature where I could add other add ons. I have these two add-on 'Always on top' & 'Windowed Fullscreen' That would make this the perfect way to browse.

It is very useful addon. Thanks for your efforts. I am using it on debian linux, Firefox 60.4.0esr. After the latest update it won't work anymore. Nothing happens when i click at toolbar icon or select page context menu item.

16-01-2018: Still not working on debian linux, Firefox 60.4.0esr. How can i privide additional info to help you? May be i can look something in code inspector?
Get back to Version 1.0.2, working pretty fine.

Works great with my window manager, saves me a lot of space when having multiple windows open.

Works perfectly, thank you.