Found this little gem today, thought I’d mention it on my corner of the web.
https://addons.mozilla.org/en-US/firefox/addon/standalone/
Creates site specific apps, like Prism used to do – for Chrome users, this is the equivalent of “Create Application Shortcuts” which I find indispensable personally.
The strange thing is, it’s been around since 2013. How did I miss it for that long? I’ve been looking everywhere for something like this.