DownloadHelper is a tool for web content extraction. Its purpose is to capture video and image files from many sites.
Just surf the Web as you are used to, when DownloadHelper detects it can do something for you, the icon gets animated and a menu allows you to download files by simply clicking an item
For instance, if you go to a YouTube page, you'll be able to download the video directly on your file system. It also works with MySpace, Google videos, DailyMotion, Porkolt, iFilm, DreamHost and others.
Since version 3.1, you can setup the extension to automatically convert the downloaded movies to your preferred video format.
When you are on a page containing links to images or movies, you can download some or all of them at once. Moving the mouse over the items in the menu will highlights the links directly in the page to make sure they are the ones you want to pick up.
DownloadHelper also allows you to download files one by one, so that you keep bandwidth to surf for other stuff to download.
To modify your preferences, like changing the download directory, right-click on the icon and choose "Preferences".
When you first install the extension, your browser is redirected to a welcome page with links to a user manual at http://www.downloadhelper.net/manual.php
and a faq at http://www.downloadhelper.net/faq.php
This does not change your homepage setting and the welcome page won't appear anymore.
Support can be obtained from http://www.downloadhelper.net/support.php
If you are having problems downloading videos from YouTube, please check this link: http://bugzilla.downloadhelper.net:8080/show_bug.cgi?id=536
UPDATE July 19th 2013:
For today's youtube changes, please follow this procedure for downloading videos that currently generate empty files:
- Open url "about:config"
- Create a new parameter called "dwhelper.yt
-sig-perm-85" of type String
- Set its value to "[[2,8],[0,1],[9,21],[65,66],[22,65],[84,85],[66,82],[21,22]]"
(without the quotes).
- Reload the youtube page (no need to restart Firefox) and you should be done.
UPDATE July 22nd 2013:
4.9.18 is waiting for approval at Mozilla. This version automatically adapts to YouTube signature changes (responsible for empty downloads) and fixes a few bugs like video variant ordering and removal of audioless or videoless variants.
UPDATE July 24th 2013:
YouTube changed their signature last night.
Version 4.9.19 is waiting for approval at https://addons.mozilla.org/en-US/firefox/addon/video-downloadhelper/versions/
Note that since 4.9.18, Video DownloadHelper automatically learns the new signatures, but your first downloads just after a signature change may fail. Just reload the YouTube video page, wait for the video to start playing after the ad and retry downloading a few times (generally 1 to 4 attempts are enough to generate the signature).
UPDATE July 26th 2013:
YouTube changed their signature permutation method again last night.
4.9.19 and 4.9.20 has been removed from the Mozilla review pool.
Current working version is 4.9.21a1 (soon to be submitted to Mozilla as 4.9.21): http://www.downloadhelper.net/install-beta.php?version=4.9.21a1
Details here: http://bugzilla.downloadhelper.net:8080/show_bug.cgi?id=536