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WEBCAT version history - 9 versions

WEBCAT by Freedom of the Press Foundation

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WEBCAT version history - 9 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 2.7.1

    Released 11 Mar 2026 - 89.99 kB
    Works with firefox 140.0 and later, android 142.0 and later
    Fixes:
    - Do not hook WASM in non-enrolled parents of enrolled iframes (#129)
    - Do not verify headers of cached files (#130)

    Source code released under MIT Licence

    Download Firefox and get the extension
    Download file

  • Older versions

    Version 2.7.0

    Released 11 Mar 2026 - 89.89 kB
    Works with firefox 140.0 and later, android 142.0 and later
    Security fixes:
    - Verify light block header fields (#123)
    - Improve Service Workers and cache cleanup (#125)

    Features:
    - Support Sigstore claims prefix matching (#127)

    Source code released under MIT Licence

    Download file

  • Version 2.6.2

    Released 1 Mar 2026 - 89.24 kB
    Works with firefox 140.0 and later, android 142.0 and later
    Fixes:
    - Error in validating the update file
    - Restore WEBCAT url bar error icon on error page

    Source code released under MIT Licence

    Download file

  • Version 2.6.1

    Released 26 Feb 2026 - 89.16 kB
    Works with firefox 140.0 and later, android 142.0 and later
    Fix:
    - Display error code in error page more reliably

    Source code released under MIT Licence

    Download file

  • Version 2.6.0

    Released 26 Feb 2026 - 88.87 kB
    Works with firefox 140.0 and later, android 142.0 and later
    Fixes:
    - Race condition for WASM validation
    - Retry update logic for failed update attempt

    Source code released under MIT Licence

    Download file

  • Version 2.5.0

    Released 26 Feb 2026 - 88.82 kB
    Works with firefox 140.0 and later, android 142.0 and later
    Fixes:
    - Tentative TBB startup fix

    Source code released under MIT Licence

    Download file

  • Version 2.4.0

    Released 25 Feb 2026 - 88.83 kB
    Works with firefox 140.0 and later, android 142.0 and later
    Fixes:
    - Better WebAssembly hooking
    - Display neutral WEBCAT icon when non-enrolled domains use enrolled resources
    - Better in-memory database management
    - Minor fixes

    Source code released under MIT Licence

    Download file

  • Version 2.3.0

    Released 23 Feb 2026 - 88.82 kB
    Works with firefox 140.0 and later, android 142.0 and later
    Feature updates:
    - Basic compatibility with Tor Browser
    - Added support for inline scripts via CSP sha256-xxx hashes
    - Stability fixes

    Source code released under MIT Licence

    Download file

  • Version 2.2.0

    Released 2 Feb 2026 - 84.37 kB
    Works with firefox 140.0 and later, android 142.0 and later

    Source code released under MIT Licence

    Download file