Requesting a new app ✨

If you are requesting a new app to be added to deb-get please complete the
following section, only one app per issue please.

• I have checked that this app does not already have a pending request and has not previously been declined.
• App Name: firefoxpwa
• Download URL: https://github.com/filips123/PWAsForFirefox/releases/download/v2.14.1/firefoxpwa_2.14.1_amd64.deb
• Website URL: https://pwasforfirefox.filips.si/
• App Summary: A tool to install, manage and use Progressive Web Apps (PWAs) in Mozilla Firefox