Unfortunately, after installing CanvasBlocker in FF 74.0 (64-Bit), Twitter doesn't work any more. Maybe, there would be a setting to prevent this, but sorry, this should be set by default, since Twitter is a very common network. Also other common sites like translate.google.com don't work any more.
Both sites work fine for me with default settings. Please open an issue at https://github.com/kkapsner/CanvasBlocker/issues with all your details so we can sort this problem out. There we can communication better and you can track the progress of your problem.
