I've seen something like that before. The browser stops responding correctly, and black rectangles appear on whatever page is open and on the browser toolbars after I close toolbar menus or click another tab. It's as if the whole browser stops replacing the graphics of the things behind the things I close. I always thought it was a memory or CPU issue. I think it happens on sites that have many entries in NoScript. Other people have reported it in Firefox, Chrome, Edge. Most answers say to disable Hardware Acceleration or GPU. I still think certain heavy webpages are the cause. If I see more, I'll save them.
I've seen something like…
I've seen something like that before. The browser stops responding correctly, and black rectangles appear on whatever page is open and on the browser toolbars after I close toolbar menus or click another tab. It's as if the whole browser stops replacing the graphics of the things behind the things I close. I always thought it was a memory or CPU issue. I think it happens on sites that have many entries in NoScript. Other people have reported it in Firefox, Chrome, Edge. Most answers say to disable Hardware Acceleration or GPU. I still think certain heavy webpages are the cause. If I see more, I'll save them.
https://support.mozilla.org/en-US/questions/1006033
https://support.mozilla.org/en-US/questions/925894
https://www.reddit.com/r/firefox/comments/3cl8kk/firefox_39_black_recta…