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Simple Modify Headers - Extended version history - 15 versions

Simple Modify Headers - Extended by Warren Bank

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Simple Modify Headers - Extended version history - 15 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 6.6.0

    Released Apr 20, 2026 - 118.58 KB
    Works with firefox 58.0 and later, android 120.0 and later
    Add support for embedding request headers into the value of any
    of the following CORS safelisted HTTP request headers:
    "accept", "accept-language", "content-language", "content-type"

    Source code released under Mozilla Public License 2.0

    Download Firefox and get the extension
    Download file

  • Older versions

    Version 6.5.0

    Released Apr 19, 2026 - 118.2 KB
    Works with firefox 58.0 and later, android 120.0 and later
    Add more encoding options for embedding request headers into value of "Content-Language".

    Source code released under Mozilla Public License 2.0

    Download file

  • Version 6.4.0

    Released Apr 19, 2026 - 118.09 KB
    Works with firefox 58.0 and later, android 120.0 and later
    Automatic behavior:
    extract request headers embedded into value of "Content-Language"

    Purpose:
    to allow Javascript network requests (ex: XHR, fetch)
    to add/modify forbidden request headers,
    without triggering a CORS preflight request

    Reference:
    https://developer.mozilla.org/en-US/docs/Glossary/Forbidden_request_header
    https://developer.mozilla.org/en-US/docs/Glossary/CORS-safelisted_request_header

    Source code released under Mozilla Public License 2.0

    Download file

  • Version 6.3.0

    Released Apr 18, 2026 - 117.38 KB
    Works with firefox 58.0 and later, android 120.0 and later
    Automatic behavior:
    always replace "x-simple-modify-headers-${name}" request headers with "${name}"

    Purpose:
    to allow Javascript network requests (ex: XHR, fetch)
    to add/modify forbidden request headers

    Reference:
    https://developer.mozilla.org/en-US/docs/Glossary/Forbidden_request_header

    Source code released under Mozilla Public License 2.0

    Download file

  • Version 6.2.0

    Released Mar 23, 2025 - 117.08 KB
    Works with firefox 58.0 and later, android 120.0 and later
    • rearrange and resize HTML elements in popup
    • add light color icon for popup in private windows

    Source code released under Mozilla Public License 2.0

    Download file

  • Version 6.1.1

    Released Feb 26, 2025 - 113.64 KB
    Works with firefox 58.0 and later, android 120.0 and later
    fix internal counter of started tabs

    Source code released under Mozilla Public License 2.0

    Download file

  • Version 6.1.0

    Released Feb 26, 2025 - 113.64 KB
    Works with firefox 58.0 and later, android 120.0 and later
    add "Add or Modify" action

    Source code released under Mozilla Public License 2.0

    Download file

  • Version 6.0.0

    Released Feb 26, 2025 - 113.58 KB
    Works with firefox 58.0 and later, android 120.0 and later
    add ability to choose distinct rule sets for each started tab

    Source code released under Mozilla Public License 2.0

    Download file

  • Version 5.0.0

    Released Jan 7, 2025 - 112.94 KB
    Works with firefox 58.0 and later, android 120.0 and later
    add ability to dynamically enable multiple rule sets

    Source code released under Mozilla Public License 2.0

    Download file

  • Version 4.0.0

    Released Jan 6, 2025 - 112.03 KB
    Works with firefox 58.0 and later, android 120.0 and later
    while globally stopped, individual tabs can be started

    Source code released under Mozilla Public License 2.0

    Download file

  • Version 3.1.2

    Released Jan 5, 2025 - 111.07 KB
    Works with firefox 58.0 and later, android 120.0 and later
    [fix] config page warns for unsaved change to selected rule set

    Source code released under Mozilla Public License 2.0

    Download file

  • Version 3.1.1

    Released Jan 5, 2025 - 111.07 KB
    Works with firefox 58.0 and later, android 120.0 and later
    config page warns for unsaved change to selected rule set

    Source code released under Mozilla Public License 2.0

    Download file

  • Version 3.1.0

    Released Jan 5, 2025 - 110.67 KB
    Works with firefox 58.0 and later, android 120.0 and later
    add dropdown in popup to change the active rule set

    Source code released under Mozilla Public License 2.0

    Download file

  • Version 3.0.0

    Released Jan 4, 2025 - 110.31 KB
    Works with firefox 58.0 and later, android 120.0 and later
    add named rule sets - to quickly switch between specific tasks

    Source code released under Mozilla Public License 2.0

    Download file

  • Version 2.2.0

    Released Sep 15, 2024 - 109 KB
    Works with firefox 58.0 and later, android 120.0 and later

    Source code released under Mozilla Public License 2.0

    Download file