HD Player High definition quality for HTML5 and Flash players
Support Development
PayPal ● 
Bitcoin Address: 1sM2BrTH8BRgt3quiASK8TmYSafutNvDo
Ether Address: 0xCf9eaAc56992e12EB61fD46342172d4EEff5C8e4

"HD Player" is a very lightweight extension that forces the HTML5 and Flash players to play videos in full-HD or highest available quality. The extension monitors quality changes and tries to keep an HD quality when possible.


  1. What's new in this version?

    Please check the Logs section.

  2. What is HD Player?

    HD Player is a lightweight extension to change the HTML5 or Flash player's quality to high definition (HD) or the highest available quality as soon as the player loads in a page. Exactly similar to change the quality through the gear icon beneath each player.

  3. Is it possible to set lower HD quality instead of the highest available one?

    Yes, from version 0.1.5 it is possible to set lower HD quality from addon's option page. Also note that if you manually select lower HD quality, the extension wont change the quality back to the highest one anymore (only and only if an HD quality is selected, 720p, 1080p, 1440p, or 2160p).

  4. I would like the extension to play the highest available quality no matter if an HD quality is chosen by player. Is it possible?

    Yes, though you need to adjust options for this. Open the option page and uncheck "Do not increase video quality if an HD quality (720p, 1080p, 1440p, 2160p, ...) is selected by user or YouTube player". Now refresh the YouTube page and let the extension force the highest quality.

  5. How to install the extension from source (XPI file)?

    Simply drag and drop it into an open Firefox window and give it permission to install. There’s no need to restart the navigator in order for the changes to take effect

  6. What can I do if I got "This developer's server appears to be busy. Please try again later." message while trying to download Google Shortcuts extension in Safari?

    You can download the safariextz file directly from the GitHub repository, https://github.com/james-fray/YouTube-HD/blob/master/src.safariextension/executables/extension.safariextz?raw=true.

Matched Content


Please keep reviews clean, avoid the use of improper language and do not post any personal information.
  • <a> Defines an anchor.

    Example: <a href="http://add0n.com">a sample link</a>

  • <pre><code> Syntax Highlighting (Supported languages: Bash, JSON, HTML, JavaScript, and CSS).

    Example: <pre><code class="javascript">var foo = 'bar';</code></pre>

  • <strong> Defines bold text
  • <blockquote> Defines a long quotation
  • <caption> Defines a table caption
  • <cite> Defines a citation
  • <em> Defines italic text
  • <p> Defines a paragraph
  • <span> Defines a section in a document
  • <s> Defines strikethrough text
  • <strike> Defines strikethrough text
  • <u> Defines underlined text
  • <br> Defines a single line break; can be used alone and don't need an ending tag

What's new in this version

Change Logs:
    Last 10 commits on GitHub
    Hover over a node to see more details

    Need help?

    If you have questions about the extension, or ideas on how to improve it, please post them on the  support site. Don't forget to search through the bug reports first as most likely your question/bug report has already been reported or there is a workaround posted for it.

    Open IssuesIssuesForks

    Recent Blog Posts on add0n.com