Unfortunately, that didn’t really work properly for me when using Firefox on Android, and still runs into all the issues. Judging by the little firefox icon it put in, it installed as a Firefox web application, effectively running within the Firefox container, meaning it’s still vulnerable to all the others that Firefox seems to have on my device.
Suggested method is to “install” the app: go to Settings, there’s an option to install the app as a PWA there.
Unfortunately, that didn’t really work properly for me when using Firefox on Android, and still runs into all the issues. Judging by the little firefox icon it put in, it installed as a Firefox web application, effectively running within the Firefox container, meaning it’s still vulnerable to all the others that Firefox seems to have on my device.