Looks very good in Reader mode on Firefox for Android but the bare layout is indeed not mobile friendly.

Android Firefox readermode is fantastic. I absolutely love it. I wish it was the default view for most pages with a toggle to see the original!

Reader mode is by far my favourite Firefox feature!

It is overwhelming how sweet is to read focused on the content instead on closing the next-to-scam popups that decides to open up on a random part of the article.

One interesting side effect of reader mode is that as all content has the same format, you get used very fast to compare content not based on external artifacts (font, colors, page layout), but in the actual message.

I had never used reader mode on FF, but just gave it a whirl for this atricle and really like it. Thanks for the tip!

It was fine for me on an iPhone SE, after switching to landscape orientation.

It's fine in Safari reader mode.

you'll hit hi res native and no mobile version sites from time to time as others have said go landscape and pinch out to zoom to text block.