it is really useful!

Great stuff. Just wanted to leave this note in case current users come here after theirs breaks: The native program has to be manually updated to support the latest Firefox. Go to github - filips123/PWAsForFirefox/issues/611

Every once in a while, newly pinned extension is not showing in the title bar. it does show in the toolbar, which is hidden.
to make it worse, it is also hidden in customization page, so it's impossible to move it in any way. also, because it weirdly requires long press to show the extensions, it's then impossible to trigger on the touchscreen.
closing all the instances will help, but, why not show the the address bar along with the toolbar in the customization page?

Great add on and works perfectly fine for me.
I would appreciate if the PWA can safe login cookies, so that I don't have to type my password every time I start the app.

I only wish it was made simpler.

Compare with Apple's web apps, which strike the best balance between reasonable customization and simplicity (i.e. I don't need any of the profile configurations and what not, I just want a working app that will work always; that will adjust to my system and blend in nicely with it, from showing the right (shape of the) icon to behavior).

Right now some web apps, after being closed, don't work. I have to relaunch them. And not all pages can be made to web apps.

This is an impressive addon. This functionality is present in chromium/chrome based browsers but sadly lacking in Firefox. Working well so far on Windows 10.

Work really well, even better than on Chrome, because you can customize a bit the PWA (like adding tabs for example, works really well to replace electron app on Linux)

Pretty much does what a PWA is supposed to do! I hope one day this extension will not be required and Firefox will just have PWA's by itself.

Does exactly what it says it does and looks native on my linux desktop

Dear Mozilla, consider supporting PWAs out of the box...