Should I allow canvas access? How do I do it?
Please be mindful when allowing canvas access as it is a very strong fingerprinting vector; however, if you are already logged into a website you shouldn't stress too much about giving it canvas access because they already know who you are.
Canvas can be handled on a per-site basis thanks to RFP. You will be prompted for access next to the URL bar, so look for the icon there.
Why am I seeing striped images?
If you see striped images in your browser, that's most likely caused by the fact that the website needs canvas access to display them properly. Check out how to allow it.