I made an account only to give this addon 1 star! Rated 1 out of 5 stars

This is addon is malware. You should not download it and try to look for an alternative. Also, this should be adressed by Mozilla or one of the developers of this addon.

It basically destroyed my Firefox, forcing me to 'refresh', which in Firefox lingo means, completely wipe out any profile data. I could not only delete this addon or the extension folder. I tried that.
The addon basically disabled javascript, flash and a number of other things on firefox. Half of the pages I tried to access did not load or look weird.
I do not get how other people can rate this 5 stars.

Why there are no release notes on new versions? Rated 2 out of 5 stars

I want to be able to decide if I'm updating it or not!! ...and I always look at the release notes on the addons options before I hit update.

Other than that, it seems to work most of the time although not always... lately has a bit of a hard time downloading some videos from YouTube

Good tool! It is working as fine as it means to say! Rated 5 out of 5 stars

Good tool! It is working as fine as it means to say!

Just Fine Rated 4 out of 5 stars

Some videos that could be downloaded from YouTube now cannot be downloaded. Whether this is the change the developer made or YouTube changed something, I wouldn't know but it would be nice to be able to download these videos again.

Being able to download JW Player videos is also a desired feature.

Overall a good add-on that does what it advertises but with slight changes it could be great. Looking forward to these changes.

Useless... Rated 1 out of 5 stars

Doesn't download any YouTube videos anymore lol...
I see no use at all to keep it!

Do NOT works on JW Player Rated 3 out of 5 stars

There are better alternatives i think, i would rather recommend "Video Downloader Professional"

This review is for a previous version of the add-on (8.4.0). 

THIS IS MALWARE DO NOT INSTALL Rated 1 out of 5 stars

Keeps reinstalling itself and Universal Downloader on my laptop, and deleting my SessionManager saved sessions.

To uninstall, I have to manually "wipe" the extension folders from my profile (see about:support to see which folders contain the extensions).

This review is for a previous version of the add-on (8.4.0). 

Paralysed my Firefox. Took up a gigabyte of system memory Rated 1 out of 5 stars

My Firefox got paralysed (16GB RAM, Death Star configuration), so I investigated my add-ons. Closing them one by one and restarting. This memory hog was using a full gigabyte of system memory!!! And did not show up on about:addons-memory add-on as using this much (this add-on is not that accurate). So be careful to monitor your memory use before and after installation. If your Firefox gets paralysed, this might be the culprit.

This review is for a previous version of the add-on (8.4.0). 

THIS ONE'S THE BEST !!!! Rated 5 out of 5 stars

I've used (and contributed to/bought) SEVERAL video downloaders over the years, and as the title says "THIS ONE'S THE BEST" of the bunch!!

This review is for a previous version of the add-on (8.4.0). 

The best Rated 4 out of 5 stars

Doesn't support 1080p on YouTube, though...

This review is for a previous version of the add-on (8.4.0). 

Great job, very usefull and working well Rated 5 out of 5 stars

Installed this morning, works very well, very easy to use. Thank you (sorry for my bad english)

This review is for a previous version of the add-on (8.4.0). 

Rated 1 out of 5 stars

There is so many youtube videos this add on no longer works on, and the list is growing. Youtube once again upgraded. I suggest you do the same with this add on

This review is for a previous version of the add-on (8.4.0). 

An update here would be nice Rated 1 out of 5 stars

Posting an update here that it's not working with the latest version of Firefox would be nice and would have saved me a bunch of time.

This review is for a previous version of the add-on (8.4.0). 

Rated 5 out of 5 stars

Working fine on YouTube and other websites instead of snagging people off take the time to thank the guy thanks man nice work.

This review is for a previous version of the add-on (8.4.0). 

Question Rated 5 out of 5 stars

Earlier this plug-in is downloaded from YouTube video file in 1080 and a temporary file, and then join them together. The result was a single file in 1080 with sound.

Now, this plugin will download the video file and the temporary file but does not connect them together. The result is a video without sound.

How can return all as it was?

This review is for a previous version of the add-on (8.4.0). 

Trojan "artur.dubovoy@gmail.com" Rated 1 out of 5 stars

Beware of this odd-on, it's a trojan artur.dubovoy@gmail.com.
it opens CMD from remote without any control.
Check the folder inside Firefox Profile folder / extensions.

This review is for a previous version of the add-on (8.4.0). 

Did Not Work Rated 1 out of 5 stars

Tried this on the latest version of Firefox with Youtube and it did not work at all. A total waste of time.

This review is for a previous version of the add-on (8.4.0). 

Very poor Rated 1 out of 5 stars

Tried it on youtube the very first video i tried to download it says no video playing....duh im watching the f**cking thing. Sh*te!!!

This review is for a previous version of the add-on (8.3.2.1-signed). 

Two Annoying Faults Rated 4 out of 5 stars

Flash Video Downloader is a really good Add-On for downloading Videos of ALL types.

The name is misleading though as it can handle the downloading of many more video formats apart from FLV.

It even easily downloads video from http://www.dailymotion.com/au which many other downloaders have difficulty with.

The only two faults with this Add-On are:

1. When downloading high quality video it
always asks for the location of your
download folder.

2. When the toolbar icon is clicked to
select a video to download the icon
and font sizes are way too small and it
very difficult to read the details of each
downloadable item.
This happens regardless of you using
compact or full mode.

If the developer could pleas fix these issues I will happily upgrade my rating of Flash Video Downloader to 5 stars.

This review is for a previous version of the add-on (8.3.2.1-signed). 

The last working version is Version 7.5.1? Rated 3 out of 5 stars

It appears that versions from 7.5.2 up to 8.3.2 (both inclusive) don't work under Firefox 7.0.1 (portable), although it says "Firefox 3.0 and later". This add-on stops other add-ons (e.g. Adblock Plus) from proper operation and it even hangs the applet "Extensions" up (in "Tools\Add-ons"). Then the only solution is to start Firefox in safe mode (FirefoxPortable.exe -safe-mode) and disable or completely uninstall/remove FVD add-on.

Version 7.5.1 works fine.

This review is for a previous version of the add-on (8.3.2.1-signed).