Correcting my last rating. The extension is broke on Ironfox, Iceraven, and Waterfox. Enabling will temporarily keep it running on most sites, but exiting the app will break it.

*Update - the extension might be going through too many growth spurts atm.. it's been hit or miss for the past few weeks. Going back to the heavier/slower Darkreader for the time being.

Just the fact that you have to reload if you change a setting makes this worthless.