I'm running a GNOME/Wayland desktop. With other browsers (GNOME Web, Chromium) I can open so-called app instances. These typically:

  1. open at a preset URL
  2. are limited to a single tab
  3. have reduced/no chrome
  4. cannot browse to any other domain/subdomain
    1. and, if I click on a link to a different (sub)domain, it opens in the default browser instance (whatever that happens to be)

How can I achieve features 4. and 4.1. with Firefox? (The rest are unimportant to me.) If a plugin is required it should have an FSF-approved license, but I'm hoping there's a setting buried somewhere.


According to this feature request on Mozilla.org it seems that it will not be implemented.
Also someone mention on this request that he developed a XUL application able to emulate such behaviour only on Linux:

wpaana Web page as an native application.

  • Does this work on Firefox 57+ (WebExtensions)? – dsstorefile1 Apr 10 '18 at 22:55
  • Try it you Will see Last update 3 months ago my bet is that it could works – Kiwy Apr 11 '18 at 6:47

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