CRX id
hnlojdafpeleignpiaagkmlobmelpjei
hnlojdafpeleignpiaagkmlobmelpjei
Description from extension meta
Masks out a section of the page.
Description from store
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.