Midnight Lizard color schemes work across all websites. The extension offers many predefined color schemes to choose from, or you’re free to explore and install more at midnight-lizard.org  ✔ Choose between dark, light, grayscale or colorful color schemes  ✔ Modify existing or create new color schemes  ✔ Use different color schemes on each website  ✔ Adjust brightness, saturation, contrast and hues  ✔ Improve accessibility and readability  ✔ Increase contrast to make text easier to read  ✔ Apply blue light filter to shift all colors towards red light  ✔ Keep original images and hues without inversion  ✔ Schedule automatic activation and deactivation  ✔ Use keyboard shortcuts to toggle extension   ⮚ on current website: Alt+Shift+L   ⮚ globally: Alt+Shift+M  ✔ Use with local HTML files  ✔ Shade bright colors and images  ✔ Change any colour you want  ✔ Dynamically change browser theme (disabled by default)  ✔ Sync your settings  ✔ Configure background, text, buttons, links, borders and images  ✔ Apply globally, per-website or with url match patterns  ✔ Switch between websites blacklist and whitelist modes  ✔ Use Simplified mode to improve performance on heavy websites  ✔ Contribute to our open source project on GitHub.com/Midnight-Lizard  ✔ Donate to our OpenCollective.com/Midnight-Lizard Please use additional extensions in order to replace default New Tab page - extensions cannot style it. Also extensions don't work on New Tab page, Firefox Add-ons store and all Firefox system pages due to security concerns. Please take a look at this tutorial: HOW TO improve Midnight Lizard performance