YouTube High Definition Version History

141 versions

Be careful with old versions!

These versions are displayed for reference and testing purposes. You should always use the latest version of an add-on.

Version 40.0 133.3 KiB Works with Firefox 3.0 and later, SeaMonkey 2.0 and later

Support for Recent YouTube Changes

Version 39.0 132.7 KiB Works with Firefox 3.0 and later, SeaMonkey 2.0 and later

Localization Support

Version 38.6 132.7 KiB Works with Firefox 3.0 and later, SeaMonkey 2.0 and later

Backward Compatibility Support

Version 38.5 132.4 KiB Works with Firefox 3.0 and later, SeaMonkey 2.0 and later

Support for Recent YouTube Changes

Version 38.4 128.2 KiB Works with Firefox 3.0 and later, SeaMonkey 2.0 and later

4K Video Support

Version 38.3.1-signed 128.2 KiB Works with Firefox 3.0 and later, SeaMonkey 2.0 and later

Critical Bug Fix

Version 38.2.1-signed 128.0 KiB Works with Firefox 3.0 and later, SeaMonkey 2.0 and later

Critical Bug Fix

Version 37.1.1-signed 120.6 KiB Works with Firefox 3.0 and later, SeaMonkey 2.0 and later

Support for Recent YouTube Changes

Version 37.0.1-signed 120.6 KiB Works with Firefox 3.0 and later, SeaMonkey 2.0 and later

Localization Support

Version 36.1.1-signed 120.4 KiB Works with Firefox 3.0 and later, SeaMonkey 2.0 and later

Support for Recent YouTube Changes

Version 36.0.1-signed 120.4 KiB Works with Firefox 3.0 and later, SeaMonkey 2.0 and later

Localization Support

Version 35.7.1-signed 117.8 KiB Works with Firefox 3.0 and later, SeaMonkey 2.0 and later

Options Support

Version 35.5.1-signed 114.7 KiB Works with Firefox 3.0 and later, SeaMonkey 2.0 and later

Support for Recent YouTube Changes

Version 35.4.1-signed 114.7 KiB Works with Firefox 3.0 and later, SeaMonkey 2.0 and later

Tiny Video Size Support

Version 35.3.1-signed 114.4 KiB Works with Firefox 3.0 and later, SeaMonkey 2.0 and later

Firefox Electrolysis Support

Version 35.2.1-signed 111.6 KiB Works with Firefox 3.0 and later, SeaMonkey 2.0 and later

Full Page Video Support

Version 35.1.1-signed 111.6 KiB Works with Firefox 3.0 and later, SeaMonkey 2.0 and later

Support for Recent YouTube Changes

Version 35.0.1-signed 111.5 KiB Works with Firefox 3.0 and later, SeaMonkey 2.0 and later

FlashBlock Support

Version 34.3.1-signed 111.1 KiB Works with Firefox 3.0 and later, SeaMonkey 2.0 and later

SeaMonkey Support

Version 34.2.1-signed 102.7 KiB Works with Firefox 3.0 and later, SeaMonkey 2.0 and later

HD Support for HTML5

Version 34.1.1-signed 102.7 KiB Works with Firefox 3.0 and later, SeaMonkey 2.0 and later

UI Adjustments

Version 34.0.1-signed 102.7 KiB Works with Firefox 3.0 and later, SeaMonkey 2.0 and later

Localization Support

Version 33.7.1-signed 102.6 KiB Works with Firefox 3.0 and later, SeaMonkey 2.0 and later

Support for Recent YouTube Changes

Version 33.5.1-signed 96.6 KiB Works with Firefox 3.0 and later, SeaMonkey 2.0 and later

Playlist Auto Play Support

Version 33.0.1-signed 95.4 KiB Works with Firefox 3.0 and later, SeaMonkey 2.0 and later

HTML5 Support

Version 32.2.1-signed 95.1 KiB Works with Firefox 3.0 and later, SeaMonkey 2.0 and later

Localisation Support

Version 32.1.1-signed 92.3 KiB Works with Firefox 3.0 and later, SeaMonkey 2.0 and later

Default Video Size Support

Version 32.0.1-signed 92.2 KiB Works with Firefox 3.0 and later, SeaMonkey 2.0 and later

Auto Play for Embedded Videos
Volume Support

Version 31.5.1-signed 91.2 KiB Works with Firefox 3.0 and later, SeaMonkey 2.0 and later

Support for Recent YouTube Changes

Version 31.4.1-signed 91.2 KiB Works with Firefox 3.0 and later, SeaMonkey 2.0 and later

Support for Recent YouTube Changes