If you spend a lot of time on internet & use Mozilla as your browser than it will be great for you if you can easily manage the browser shortcuts.
Like windows shortcuts copy , paste make our work so easy like this it will be great and simple if we can do same in browser because many people spend time more on browser than windows. So there is a Mozilla add-on named as “customizable shortcuts” by which you can easily manage your browser shortcuts.
Apart from customizable shortcuts there are also other useful Mozilla addons for shortcuts like “File and Folder Shortcuts” , “Google Shortcuts” etc ….
So go and download it now.