This extension gradually colors paragraphs on webpages so your eyes can easily continue to the next line. This is especially useful for reading long articles and small-sized text.
The extension is a bit slow but that's due to technical limitations.
Developer comments
Don't expect it to work on every page. Report issues on:
https://github.com/MicroDroid/youtube-download-button/issues
Contributions are welcome. Starring the GitHub repo would be nice, too.