Great, but... Rated 4 out of 5 stars

It's great for flash player YouTube, doesn't work for html5 though.
It allows to set many things making YouTube more convenient to use.
Unfortunately it has some bugs.
First it sometimes doesn't start buffering right away and I have to manually start it.
Second is that sometimes doesn't load properly. Pop-up window shows only one line with donation and global settings and auto-pause doesn't work then.
They're annoying, so I hope it will be fixed.
One more thing. I don't know what's a desktop notification, but why can't you give an option to use a build-in notification in Firefox?

Don't seem to work anymore Rated 1 out of 5 stars

I have tried this addon for 3-4 days and it seem to have no effect on youtube videos. I have tried different options but no change. Read somewhere that it can be issue with html5 but I have really no idea.

¡Good Idea! Rated 3 out of 5 stars

I just want congratulate for what you did, it's a really great idea!.

Just few things, after installed it on Debian Debian GNU/Linux 8.2 (jessie), XLDE desktop and try with Firefox 42 and Youtube, didn't show anything (the options when you move the mouse cursor over a youtube video), not working at all.
I tried the same on Chrome for Debian and work perfectly in the same computer and OS.
Do you have any idea what could be wrong?, may be some paths?.

Thank you!

Realmente útil Rated 5 out of 5 stars

Es muy útil este complemento, ofrece una experiencia mejorada en Youtube al administrar más eficientemente la carga del buffer, ademas de ocultar las anotaciones que en la mayoría de los casos solo molestan.

This user has a previous review of this add-on.

Rated 2 out of 5 stars

This is no longer working! Please update.

Need YouTube Flash Video Player in order to use at the moment. Rated 4 out of 5 stars

Youtube has forced html5 as the default player. Add this plugin along with

to fix the problem.

This user has a previous review of this add-on.

Rated 2 out of 5 stars

Doesn't work for me when I use the &html5=1 url parameter to force HTML5 video.

Similar app available elsewhere Rated 1 out of 5 stars

Seeing as this hasn't worked in ages, people might want to try YouTube High definition. Does some prebuffering but not as well Smartvideo used to do. Also fixes quality of videos and screen size. If anyone knows of other alternatives, please post.

Emailed the author for support, but nothing's happened for ages. Please fix and rating will be updated.

This user has a previous review of this add-on.

Autoplay on playlists fix needed Rated 5 out of 5 stars

smart video for youtube is breaking autoplay on playlists sometimes have to click on the big play button to go to the next video.

This user has 2 previous reviews of this add-on.

No longer working for me. Rated 1 out of 5 stars

This extension wuz working great until a few months ago. I'm guessing YouTube changed something.

Rated 3 out of 5 stars

doesn't work with Firefox 38.0, please fix it!

Rated 1 out of 5 stars

It does not work at all.

A shame... Rated 3 out of 5 stars

I would give you 10000 stars! I f it wasn't so buggy... Makes it almost useless! I'm going to give it one more chance because if they correct those issues, it will be an awesome addon! But right now, it freezes and crashes A LOT and it's really annoying...

Rated 1 out of 5 stars

Не работает

Broken and buggy as hell... Rated 1 out of 5 stars

This Add-On has been super buggy for months if not years. Usually I don't write reviews, but this add-on has caused me so much trouble... it was just screaming for a negative review.

Pleased Rated 5 out of 5 stars

This did what I wanted it to do: allow me to pre-buffer videos as I like to bounce around videos and with DASH that means constant loading for me with my ~2MB connection.

I had to switch from 480p to 720p though as the former isn't offered with DASH disabled.

My main criticisms are:
- It takes a while to load after the page loads, so the video starts buffering, then SmartVideo loads and the buffering starts all over again.
- It requires two clicks rather than the usual one to get to the settings screen from the Firefox addons page.
- I'm starting to get the feeling that this addon is no longer supported.

Rated 1 out of 5 stars

Stopped working

This user has a previous review of this add-on.

Needs an update Rated 4 out of 5 stars

Firefox seems to be updating constantly and with these updates, I'm sure it has been effecting addons. SmartVideo is a wonderful addon, but since the last Firefox update, it seems to work *most* of the time. It used to work all the time, but I've been noticing it working slightly less often than it used to.

Other than this problem, this addon is fantastic. I live in an area where the internet is rather slow, so I can have it automatically set my videos to 240 and auto pause. I get my news from youtube, so I often open up multiple tabs of videos, so this is quite handy.

I see that one user complained about the popup at the bottom. I'm pretty sure there is a setting to remove it.

I love the capabilities of this addon, but it needs an update... Rated 3 out of 5 stars

When this addon works properly, it works well, but recently it's been causing errors with youtube videos, especially when you go to many youtube videos in a row in the same tab. Or sometimes the youtube video stops for no reason mid-way and says there was an error that had occurred and I have to refresh the tab to get back functionality.

annoying pop up screen below video Rated 1 out of 5 stars

the pop up screen below the video is annoying, made me uninstall this