# Change gecko id in "browser\_specific\_settings"

**URL:** <https://discourse.mozilla.org/t/change-gecko-id-in-browser-specific-settings/43320>\
**Category:** Add-ons\
**Created:** [August 2, 2019, 10:45am UTC](https://discourse.mozilla.org/t/change-gecko-id-in-browser-specific-settings/43320 "2019-08-02T10:45:32Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![chutikran40](https://avatars.discourse-cdn.com/v4/letter/c/7993a0/32.png) [@chutikran40](https://discourse.mozilla.org/u/chutikran40)\
**Post date:** [August 2, 2019, 10:45am UTC](https://discourse.mozilla.org/t/change-gecko-id-in-browser-specific-settings/43320/1 "2019-08-02T10:45:32Z")

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Hi, I have a question about “browser\_specific\_settings” . When I submit add-on on Firefox I can change a new gecko id in “browser\_specific\_settings” ? If can change that how I do it. Thank you

 ![Capture](https://us1.discourse-cdn.com/flex001/uploads/mozilla/original/3X/a/7/a7455db052a987ab35add55ef06aff822074f332.png)

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**Author:** ![freaktechnik](https://sea1.discourse-cdn.com/flex001/user_avatar/discourse.mozilla.org/freaktechnik/32/37766_2.png) [@freaktechnik](https://discourse.mozilla.org/u/freaktechnik)\
**Post date:** [August 3, 2019, 12:40am UTC](https://discourse.mozilla.org/t/change-gecko-id-in-browser-specific-settings/43320/2 "2019-08-03T00:40:14Z")

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That ID is used to identify your extension. So if you’ve already published it, you likely don’t want to change the ID. Else you simply change the contents of the JSON file.

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**Author:** ![ma.chutikran\_st](https://avatars.discourse-cdn.com/v4/letter/m/6bbea6/32.png) [@ma.chutikran\_st](https://discourse.mozilla.org/u/ma.chutikran_st)\
**Post date:** [August 5, 2019, 10:37am UTC](https://discourse.mozilla.org/t/change-gecko-id-in-browser-specific-settings/43320/3 "2019-08-05T10:37:32Z")

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And in the case that I want to change. Can I change it?

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**Author:** ![jorgev](https://avatars.discourse-cdn.com/v4/letter/j/71c47a/32.png) [@jorgev](https://discourse.mozilla.org/u/jorgev)\
**Post date:** [August 6, 2019, 7:35pm UTC](https://discourse.mozilla.org/t/change-gecko-id-in-browser-specific-settings/43320/4 "2019-08-06T19:35:08Z")

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You can’t change the ID of an existing add-on. A new ID is a new add-on, and you won’t be able to automatically migrate your users to the new ID if you choose to start over.