As far as i know it worked fine for me so far, but i started using Google Sheets and it kill the performance. Very laggy and slow sheets. When i disabled this extension it started to scroll smooth as a kitty.
Update: disabling the extension on the site fixed the issue.
It's most probably the protection of DOMRects. You can disable it on a site by site basis. If this does not help please open an issue at https://github.com/kkapsner/CanvasBlocker/issues were we can communicate better and others can find the solution better.
