I'm a working musician and created my own HTML lyrics files with embedded MP3s. On Windows7 they worked perfectly but unfortunately a venue damaged my laptop and kindly replaced it. The new laptop has Windows 10 so the first thing I did was install Firefox. I transferred my backup HTML files and folders to the new laptop and expected a bit of tweaking of my hyperlink lists that pointed to my stored HTML files. Just to check out if the HTML was working, I clicked on one and sure enough it opened in Firefox but no backing MP3 track. My older laptop Firefox had QuickTime Plugin 7.7.8 and Shockwave Flash which I cannot find in the new Windows 10 Firefox. Are there any compatible plugins or do I have to redo more than 500 web pages. I NEED HELP URGENTLY Any assistance is greatly appreciated Thanks in advance