Wandering ProgressTracker per PingZing

Tracks reading per-chapter progress for the Wandering Inn web serial. Will display a red marker just above the last paragraph read, and automatically return you to that point if you return to that chapter on any of your devices with Firefox installed.

- Displays last-read position per-chapter.
- Automatically scrolls to that position when returning to the chapter.
- Syncs progress between Firefox browsers if you have a Firefox account and use Firefox sync.
- Can be used to share progress with Firefox for Android*

* Requires installation of this addon to Firefox for Android, which is currently only available via Nightly, as well as some extra shenanigans.