This worked great before in making YouTube display tags like it used to, but it's a blatant scam now, asking you to pay $50 dollars to view tags that you can view for free by right-clicking, selecting View Page Source, and searching "keywords" with Ctrl+F. What's worse is that seemingly in response to reviews mentioning workarounds with earlier versions, the author seems to have taken down all previous versions that functioned properly in hopes that people will have no choice but to pay for this obvious scam. Hope this garbage gets taken down by Mozilla.