While firefox doesn't really have an 'app' mode¹, it can sort of be emulated by using a separate profile and a custom userChrome.css for that profile that hides most of the chrome. See https://askubuntu.com/a/487954/167099 for details.
What this doesn't provide, afaict, is a way to customize the window title and icon (the shell will keep associating this new window to firefox instead of considering it a separate app). ¹ https://bugzilla.mozilla.org/show_bug.cgi?id=1283670 ** Bug watch added: Mozilla Bugzilla #1283670 https://bugzilla.mozilla.org/show_bug.cgi?id=1283670 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1688627 Title: Amazon web app needs an implementation that does not require webbrowser-app To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/webapps-applications/+bug/1688627/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
