Poor performance with the website when using Firefox (Firefox: 84.2, 85.0; Windows: 10 2004). Same message below the address bar as knorbeck reported here: "A web page is slowing down your browser. What would you like to do? [Stop it] [Wait]". Site eventually loads with no error. Poor performance when navigating the site, but playback is unaffected so long as system resources are available.
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