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YouTube Thumbnail Viewer version history - 6 versions

YouTube Thumbnail Viewer by gifnksm

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YouTube Thumbnail Viewer version history - 6 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 0.5.1

    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 Firefox and get the extension
    Download file

  • Older versions

    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