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YouTube Animated Thumbnails 1.2.1-signed.1-signed
by Victor Porof
Firefox extension that animates the video thumbnails on YouTube.
Here's the source code: https://github.com/victorporof/YouTube-Animated-Thumbnails
This add-on has been marked as experimental by its developers
About this Add-on
* Remove thumbnails when new tabs open: https://github.com/victorporof/YouTube-Animated-Thumbnails/commit/4bdbf72f27db34ac5d8aa2a051ccc56d4209e600
* Don't unnecessarily slow down shutdown: https://github.com/victorporof/YouTube-Animated-Thumbnails/commit/ddb4c6c8e037a783f5c184887925016595fa0669