This is an excellent addon. However, due the lack of customization, I give this only 3 stars. If I could customize the number of letters emboldened at the start of each word, then I would give this a solid 5 stars, easily. Hopefully the developer comes out with this option very soon.

I appreciate the effort, but there are two issues:
1. It slows down browsing in some cases.
2. Sometimes it messes with the style, not breaks, but makes things ugly.

It seems you care, so I'll drop some details in github:)

Works well for reading articles, but just a heads up it prevented me from using certain features on sites. Ex: I was on Vessi and when I went to a size guide I was unable to select the sizes or hit the Next button. It worked once I turned Smart Reader off.

Works well reading-wise but I noticed on some sites, plain text elements that were meant to do something when you click on them were no longer clickable after being altered by the plugin while enabled.