Is this project dead?

[LinuxOnTheDesktop]

The present program has served me well, but it does have its problems and the issue tracker seems to show no engagement from the developer(s) with some recent issues.

EDIT: A possible replacement is Dark Reader, which is an extension still available via the Firefox official channel, and yet which itself shows some signs of being dead. Also, the interface it imposed upon Firefox is a little blocky - here's a screenshot:

    There is also an addOn called 'dark mode', which is less blocky; but it was last updated four years ago - and seems not to work on Google Books.