On Android at least, Firefox PWA’s don’t seem to support registering system-level things (like ‘Share To’ handlers) - you need to use a Chrome PWA for that…
No Japanese :(
Is it a typo that it says “Wear OS Security Bulletin—August 2023” at the top?
For me:
browser.ctrlTab.recentlyUsedOrder: False
browser.tabs.insertAfterCurrent: True
dom.popup_maximum: 100
browser.download.improvements_to_download_panel: False
Hopefully with real passive options (like etymotic triple flange tips) and the wing tip from the a-series!