Nice readability increase for common sites that stupidly use gray text. Usually works and I forget it's running. The occasional site can't have its text darkened. Working fine with uBlock Origin and NoScript on Android.

Works well, except for sites which abuse the !important tag in their css. For example
the reviews on www.wilko.com. It's littered with !important tags. I was able to temporarilly make the pale grey text black by deleting one "!important" from a tag in the Firefox console, thus proving the point. Perhaps there's a way to override these evil tags in the addon?

Option panel doesn't show options ! FF 78.0.1 x64 win10 here and last version of extension

Nice add-on except that the "Skip links", "Skip headers" options are broken as of Firefox 62? When enabled for all sites, it works but all headers and links turn black.

Ironically, the icon is barely visible if I'm using a dark Firefox theme. ;-)

Even though this is said to be for dark text on light background, it also seems to work pretty well when using some addons for black/dark background with light text. Although it does have some problems/quirks.

When using the extensions "Night Mode Pro" or "Owl" (interchangeably on various websites, sometimes italicized/underlined text will turn black on the dark background.
For an example - when using "Night Mode Pro" on the following website: http://forum.luminous-landscape.com/index.php?topic=121095.new#new

It would also be nice if the toolbar button acted as a permanent on/off switch, and/or was settable according to website domain, subdomain, or url. It can get annoying to always have to switch it on when going to a new website - or even the same website in a new/different tab.

Still very helpful though, when needed.. Even for my dark/black backgrounds.

This is super clean and useful, except when I am on a page that uses gray text on black background, in which case it makes everything black on black. It would be really awesome if there was the ability to select a custom color if I wanted to.