The latest Firefox Mobile update broke the app.

The Dev will only notice if I give this 1 star. In reality it is a FIVE STAR APP. So apologies to the Dev for having to bring it to your notice by this route.

Abandonware.

I like the idea of this and I wish I could get it to work on 56.0 for Android. Alas, it appears in the drop down menu but selecting the"Legibility" menu item does absolutely nothing. Tried restarting my tablet to no avail. Any suggestions gratefully received.

I installed this on Firefox 52 on Android 6.0.1, but it has no effect. It shows up in the list of addons, but it has no effect and I can't find any menu item anywhere in Firefox that refers to it. Like it's invisible.
It says it runs on Firefox 48 and later. Did this stop working recently?