If it was because it kept opening random websites from your history, I helped diagnose that bug not long ago. And the dev got it fixed!
I’m happy with the plugin, and it has completely replaced my Edge PWAs. Even better, unlike Edge/Chrome, I’m allowed to rename the shortcut name or modify the url before creating the shortcut. And to open PWA links as tabs. Only drawback I’ve found so far is that the PWA runs on its own Firefox profile. Not a big issue with Firefox sync.