Question: how to download youtube videos without any software in firefox?
Answer: YouTubeMP4. This online tool is one of the easiest ways to download YouTube videos without any software. ... 
SaveTube. ... 
Savefrom.net. ... 
Catchvideo. ... 
Clipconverter.cc. ... 
Converto. ... 
YouTubNow. ... 
SConverter.com.