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YouTube Thumbnail Viewer version history - 7 versions

YouTube Thumbnail Viewer by gifnksm

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YouTube Thumbnail Viewer version history - 7 versions

  • Be careful with old versions! These versions are displayed for testing and reference purposes.You should always use the latest version of an add-on.

  • Latest version

    Version 0.6.0

    Released Jun 22, 2026 - 882.88 KB
    Works with firefox 58.0 and later
    • Added support for YouTube Live page URLs, such as https://www.youtube.com/live/<VIDEO_ID>, so thumbnail previews now work there as well.
    • Improved the address bar icon so it is easier to see in both light and dark Firefox themes.

    Source code released under MIT License

    Download Firefox and get the extension
    Download file

  • Older versions

    Version 0.5.1

    Released Mar 22, 2026 - 885.19 KB
    Works with firefox 58.0 and later
    Improved thumbnail update stability
    • Prevents race conditions that could cause flicker or stale thumbnails
    • Limits tabs.onUpdated handling to the current window to reduce unnecessary reloads
    • Clarifies thumbnail reset/apply flow for more predictable behavior

    Source code released under MIT License

    Download file

  • Version 0.5.0

    Released Mar 22, 2026 - 884.78 KB
    Works with firefox 58.0 and later
    Improved thumbnail fallback reliability
    • Falls back to valid thumbnails when maxresdefault is missing
    • Prefers Shorts oar... thumbnails so vertical images are shown when available
    • Chooses the largest available real thumbnail even if some variants are missing

    Source code released under MIT License

    Download file

  • Version 0.4.0

    Released Mar 22, 2026 - 884.27 KB
    Works with firefox 58.0 and later
    • Improved thumbnail preview reliability for both standard YouTube videos and Shorts.
      (Feature enhancement contributed by evrial on GitHub.)

    Source code released under MIT License

    Download file

  • Version 0.3.0

    Released Jan 30, 2022 - 921.82 KB
    Works with firefox 48.0 and later
    v0.3.0 (2022/01/30):
    • Support /live URLs
    • (internal change) Thumbnail URLs are now retrieved from OGP metadata when possible instead of video URLs.

    Source code released under MIT License

    Download file

  • Version 0.2.0

    Released Feb 22, 2021 - 957.76 KB
    Works with firefox 48.0 and later
    v0.2.0 (2021/02/22):
    • Support YouTube Music

    Source code released under MIT License

    Download file

  • Version 0.1.1

    Released Jun 28, 2020 - 871.12 KB
    Works with firefox 48.0 and later

    Source code released under MIT License

    Download file