Video DownloadHelper Companion App 1.1.0

Some operations required by Video DownloadHelper cannot be performed form within the browser. In order to be able to still to the job, the add-on relies on an external application that is called transparently. We call it the Companion Application.

Windows

Download and double-click the file, then follow instructions

Mac OS - pkg

Recommended installation method

Linux - 64 bits - deb

Debian, Ubuntu

SHA256: 81c8e5bf0ca8848c8ad3670e19bdb07bf04522674ac8ab8c2e1463db411193af

Linux - 64 bits - targz

Other linux distributions

Extra step required to complete install
SHA256: b68c6f8f82a0b27707ea9a8ed4966cc1b522ae33412abb3c2507ae227cdd1713

Linux - 32 bits - deb

Debian, Ubuntu

SHA256: 427778aa82f1ff6b353024d23c88daca7fc15e9f1a663156d87099f73dd28a21

Linux - 32 bits - targz

Other linux distributions

Extra step required to complete install
SHA256: deb2eb0642ff83486084b0f6e3c5f0a0cafedba0d2334dce373a6b00a8180b96

Linux targz installation

targz user-wide install

# tar xf net.downloadhelper.coapp-1.1.0-1_amd64.tar.gz -C ~ # ~/net.downloadhelper.coapp-1.1.0/bin/net.downloadhelper.coapp-linux-64 install --user

targz system-wide install

# sudo tar xf net.downloadhelper.coapp-1.1.0-1_amd64.tar.gz -C /usr/local # sudo /usr/local/net.downloadhelper.coapp-1.1.0/bin/net.downloadhelper.coapp-linux-64 install --system

Linux targz installation

targz user-wide install

# tar xf net.downloadhelper.coapp-1.1.0-1_i386.tar.gz -C ~ # ~/net.downloadhelper.coapp-1.1.0/bin/net.downloadhelper.coapp-linux-32 install --user

targz system-wide install

# sudo tar xf net.downloadhelper.coapp-1.1.0-1_i386.tar.gz -C /usr/local # sudo /usr/local/net.downloadhelper.coapp-1.1.0/bin/net.downloadhelper.coapp-linux-32 install --system

Mac OS dmg installation

Drag the dmg to some location

user-wide install

# <drag location>/net.downloadhelper.coapp-1.1.0/bin/net.downloadhelper.coapp-mac-64 install --user

system-wide install

# sudo <drag location>/net.downloadhelper.coapp-1.1.0/bin/net.downloadhelper.coapp-mac-64 install --system

Other system installers

Linux - 64 bits - targz

Other linux distributions

Extra step required to complete install
SHA256: b68c6f8f82a0b27707ea9a8ed4966cc1b522ae33412abb3c2507ae227cdd1713

Linux - 64 bits - deb

Debian, Ubuntu

SHA256: 81c8e5bf0ca8848c8ad3670e19bdb07bf04522674ac8ab8c2e1463db411193af

Linux - 32 bits - targz

Other linux distributions

Extra step required to complete install
SHA256: deb2eb0642ff83486084b0f6e3c5f0a0cafedba0d2334dce373a6b00a8180b96

Linux - 32 bits - deb

Debian, Ubuntu

SHA256: 427778aa82f1ff6b353024d23c88daca7fc15e9f1a663156d87099f73dd28a21

Mac OS - pkg

Recommended installation method

Windows

Download and double-click the file, then follow instructions

What does this companion application does ?

  • It provides a way to write files to the disk. The only ways to write a file from a browser add-on is to use the downloads API which basically takes an URL and transfers the data verbatim to the downloads directory. Even if the downloaded data can be generated internally by the add-on, it is not suitable to writing big files like videos. The ability to write files from an add-on was present in Firefox but does not exists in Chrome nor Firefox (>= 57). Writing files from the add-on is necessary when downloading streams using protocols HLS and DASH.
  • It contains a build of the very popular ffmpeg video converter application. This is required by the add-on to create audio+video files when audio and video data are streamed separately. This is also necessary if you want to perform any conversion operation on the downloaded media. Previously, you also had to download a converter for those operations on Firefox (and conversion/aggregation was not supported on other browsers).

How safe is it to install and run the companion app ?

  • The companion application is very safe. It complies with the Native Messaging Protocol which ensures the application cannot be launched by other add-ons that could do a bad usage of it.
  • In addition, the full code of the companion application is released in open-source to ensure full transparency.

How hard is it to install and run the companion app ?

  • Running the companion app cannot be simpler: you don't have anything to do. Video DownloadHelper will take care of calling the app whenever it requires an operation that cannot be done from within the browser. You won't see anything except a nice result.
  • Installing the companion application is also very simple: you just have a regular installer that you execute once and you are done. On Mac, contrarily to the previous converter for Firefox that was hard to install (involving the installation of the homebrew intermediate installer), you now just have to download a pkg file and doublie-click on it.

Companion app source code