So, without much ado, here are some of the best Firefox add-ons that help you have a better YouTube experience.
1-Click YouTube Video Downloader
What makes this downloading app so special is purely its simplicity. Once installed, you'll find a small button below the video you are watching. This will let you choose the quality of the video you want to download, and then once you click it, the video starts downloading automatically. The add-on supports a wide variety of major formats like MP4, FLV, WebM, 3GP thus letting you watch the video later on any device you like. While it doesn't add any fancy functions to the mix, its simplicity is the only reason, which will probably make you start using it right away.
Ageless for YouTube
If you are over 18 but still find it annoying that you have to sign in to watch age-restricted videos, then this next add-on is just for you. Once installed, you won't have to sign in every time you watch an age-restricted video. This is great for people who don't have a YouTube account or don't want to sign up for one.
If you are someone annoyed by some of the unwanted elements on the YouTube page then this extension will come in handy. By simply a single click you can hide the comments section, the sidebar, ads, and other parts of YouTube that you find annoying. What gives this add-on the upper edge is that it lets you customize the look of your YouTube page the way you want it to. If you prefer, you can customize it till the only thing you see is your video and nothing else. It is really a great tool for minimalists.
Download YouTube Videos as MP4
Much like the aforementioned 1-click YouTube Downloader, this one too puts a simple download button below your videos. What is great about this add-on is that it doesn't require you to restart the browser. As far as restrictions go, this one is limited to MP4s only. However, if all you do is watch videos on your desktop, this addon fits the bill.
If you are not living in the United States, watching videos that are blocked in your country can be quite a trouble. Though there are many workarounds for that (like VPN), there isn't a convenient solution that just works. Thankfully, though there's a simple extension to remedy that problem. YouTube Unblocker does exactly what it says, it automatically unblocks disabled videos like VEVO by enabling proxy that directs to the US website. So instead of completely using YouTube with a proxy server, this addon intelligently queries the video so that you will be watching only the blocked videos through a proxy. There are no VPN or shady sites involved here.