Great Rated 4 out of 5 stars

Works realy well, the only problem i see so far is that i need to put .mp4 or else after the title of the video.
The button dosent look perfect but is still ok and nice to have.
I have no problems yet and also no ads

Rated 5 out of 5 stars

Good

4k ? Rated 2 out of 5 stars

"Download YouTube videos quickly and easily!
Supports all available YouTube formats (MP4, FLV, WebM, 3GP) for any video quality (from 144p up to 3072p)."

Finde nicht 2160p !

Rated 5 out of 5 stars

love this add-on! have downloaded several videos already, about 500mb each. exactly what I wanted.

Сразу всё сработало, спасибо! Rated 5 out of 5 stars

Установил, зашёл на Ютюб, кликнул на кнопку и скачал MP4
Всё работает. Спасибо, разработчики!

Do Not Download Rated 1 out of 5 stars

Ads! Egads..............

Rated 4 out of 5 stars

This addon seems working well..

Rated 3 out of 5 stars

Baixa tudo, sem problemas, mas, não baixa mp3 :(
We have mp3 down!

FAR too limited :( Rated 1 out of 5 stars

Removed and installed Download Manager (S3), better downloaded, more versatile and less crashes and ZERO ADS!

Need Updates Rated 3 out of 5 stars

This Addon Need a Update for the Uptodate Firefox. 0 Bytes Downloads, last Update 15 January 2015 whats wrong Programmer ? I am going back to Firefox 35.0.1 to bring that addon to work, not fine but it works without problems.

This review is for a previous version of the add-on (2.3.8.1-signed). 

This and its ads suck. Rated 1 out of 5 stars

This add-on enforces adware. It keeps switching the current address to "offers.bycontext.com". I don't even know how the heck this got installed in my browser, as I already have a trusted video downloader. I'd give this a zero-star rating if there were such a thing like that here.

This review is for a previous version of the add-on (2.3.8.1-signed). 

works but has a significant issue Rated 3 out of 5 stars

I noticed a previous review
by Jappie on March 15, 2015 · permalink · translate

"Some people mention the problem the download might not start and seams to be frozen by trying to download @ 0 bytes. I had the same problem and could solve it by restarting firefox. afterwards, it worked fine for me - every time I had this problem."

I have verified the issue that Jappie mentioned occurs and also that their workaround method works ... but it is a hassle to need to restart Firefox

pro: works, simple

con: buggy download start, ugly button

update - the download @ 0 bytes is happening EVERYTIME now ...and the workaround is getting to be too annoying to deal with (downgrading Rating)

update 2 - it does however allow for multiple downloads to be 'queued' and thus continued when the user restarts firefox ...still annoying to need to do so in the first place ... I don't remember needing to do so with an earlier version sometime last year

This review is for a previous version of the add-on (2.3.8.1-signed). 

Please disable annoying advertising pop-ups! Rated 3 out of 5 stars

This amazing 5*-tool works as it should and therefor thank you so much.
Unfortunately the 1-Click-Team has build in an ad pop-up with no way to out-opt. At random when starting Firefox the homepage of 1-Click appears. This devalues this fantastic add-on a bit.
So please create an option to uncheck this ad.

This review is for a previous version of the add-on (2.3.8.1-signed). 

Rated 4 out of 5 stars

Some people mention the problem the download might not start and seams to be frozen by trying to download @ 0 bytes. I had the same problem and could solve it by restarting firefox. afterwards, it worked fine for me - every time I had this problem.

This review is for a previous version of the add-on (2.3.8.1-signed). 

Updating is needed. Rated 3 out of 5 stars

Youtube must have made again some changes because this add-on is not working now. Never-ending download with 0 byte.

This review is for a previous version of the add-on (2.3.8.1-signed). 

Does this add on still work? Rated 3 out of 5 stars

Someday ago, my add on does not work. It still download with 0 byte and no time remaining?
Help me pls!

This review is for a previous version of the add-on (2.3.8.1-signed). 

Copy to clipboard Rated 3 out of 5 stars

Since download doesn't work properly on win 8.1, I'm using "copy to clipboard", then after pasting link into the address bar I can play it or Save video as... :) It's no longer one click, but still download. Btw. on Kubuntu i can download without any issues, it's version of FF related issue.

This review is for a previous version of the add-on (2.3.8.1-signed). 

It doesn't work Rated 1 out of 5 stars

I just installed it. I see the red button, click, and choose. My Downloads say it's downloading, but it remains at "0 bytes" with "unknown time remaining" until I give up and delete it. I even tried it overnight. It doesn't work. If someone has a solution, I'd love to try it, but I couldn't find a support forum for this plugin.

This review is for a previous version of the add-on (2.3.8.1-signed). 

Rated 5 out of 5 stars

Very good, but some videos can't be downloaded with this. Still, 5 stars!

This review is for a previous version of the add-on (2.3.8.1-signed). 

Works but 2 glitches Rated 4 out of 5 stars

There is a glitch in the "Save As" function where the program overwrites the previous download with the current file.

When downloading multiple files, you need to manually rename each file, or it will overwrite the previous download.

The result is you will have different file names, all of the same video.

Red "download" button does not always appear. You must sometimes reload the page to activate the download button.

And again, as always, does not work for VEVO / VEMO titles.

Other than that, not a bad little utility.

This review is for a previous version of the add-on (2.3.8.1-signed).  This user has 3 previous reviews of this add-on.