Page Masker is a accessibility chrome extension. it's a free extension , it has 39 active users since released its first version, it earns an average rating of 5.00 from 1 rated user, last update is 3361 days ago.
If the clutter of a page is to much then this will help to mask out all but a specified area of the page. The mask size is adjustable and follows your mouse.
You could download the latest version crx file or older version files and install it.
English.
You could find more help information from page masker support page.
You could send emails to publisher, or check publisher's website.
More about manifest_file of page masker.
You could click to report abuse of page masker.