Sauron - Dark mode for all websites от Rishabh Maheshwari

USE A DARK THEME FOR BEST EXPERIENCE
WORKS ON ANDROID TOO (EXPERIMENTAL)
Sauron makes late-night working and web surfing comfortable for your eyes by making a dark mode for all the websites you visit.
Dark Mode / Night Mode for all websites including Twitch, Facebook, Twitter, Instagram, Youtube, Google Docs, GMail, Wikipedia, Salesforce, Reddit, Amazon, GOG etc.

People with Irlen Syndrome / Contrast Senstivity and Astigmatism will find Sauron useful and find that it helps reduce eye strain.

Now comes with a whitelist feature!

Features:
0. No White flash (You might see one only when you open a new tab but, that's due to Firefox).
1. Intelligent Dark Mode / Night mode makes beautiful dark mode without ruining the original design.
2. Image Filter reduces the brightness of large images automatically.
3. Blacklist for all settings available.
4. Scheduler to Schedule dark mode according to the time of the day.
5. Fast and optimized code with little to no noticeable performance overhead.
6. Works on all websites including complicated word processors so you can work late at night comfortably.