# Add-on is incompatible with Firefox 58.0.1, the latest release of Firefox.

**URL:** <https://discourse.mozilla.org/t/add-on-is-incompatible-with-firefox-58-0-1-the-latest-release-of-firefox/25100>\
**Category:** Development\
**Created:** [February 2, 2018, 4:34pm UTC](https://discourse.mozilla.org/t/add-on-is-incompatible-with-firefox-58-0-1-the-latest-release-of-firefox/25100 "2018-02-02T16:34:40Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Mazaro](https://avatars.discourse-cdn.com/v4/letter/m/b9bd4f/32.png) [@Mazaro](https://discourse.mozilla.org/u/Mazaro)\
**Post date:** [February 2, 2018, 4:34pm UTC](https://discourse.mozilla.org/t/add-on-is-incompatible-with-firefox-58-0-1-the-latest-release-of-firefox/25100/1 "2018-02-02T16:34:40Z")

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I have an extension, but I need help updating Compatibility in manage my submissions

 ![1a](https://us1.discourse-cdn.com/flex001/uploads/mozilla/original/3X/f/d/fd74220d73ebf5ef3f034a02ba2e78110d3ab758.jpg)

 ![2a](https://us1.discourse-cdn.com/flex001/uploads/mozilla/original/3X/f/1/f18e11eb201d88f3977241ef2a3fb4c1b4f28799.png)

[https://www.dropbox.com/s/imrsqgo8if4f7dp/install.rdf?dl=0](https://www.dropbox.com/s/imrsqgo8if4f7dp/install.rdf?dl=0)

I tried to update but I still have the same problem

The extension compatible but what is the correct number?

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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:** [February 2, 2018, 5:02pm UTC](https://discourse.mozilla.org/t/add-on-is-incompatible-with-firefox-58-0-1-the-latest-release-of-firefox/25100/2 "2018-02-02T17:02:40Z")

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Seeing that it has an install.rdf it is almost certainly not compatible with Firefox 57 and later.

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**Author:** ![Mazaro](https://avatars.discourse-cdn.com/v4/letter/m/b9bd4f/32.png) [@Mazaro](https://discourse.mozilla.org/u/Mazaro)\
**Post date:** [February 4, 2018, 4:19am UTC](https://discourse.mozilla.org/t/add-on-is-incompatible-with-firefox-58-0-1-the-latest-release-of-firefox/25100/3 "2018-02-04T04:19:56Z")

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> [@Mazaro](#):
>
> install.rdf

Can you tell me what is the alternative install.rdf or simple addition Compatible with Firefox 57 and later?

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**Author:** ![juraj.masiar](https://sea1.discourse-cdn.com/flex001/user_avatar/discourse.mozilla.org/juraj.masiar/32/30587_2.png) [@juraj.masiar](https://discourse.mozilla.org/u/juraj.masiar)\
**Post date:** [February 4, 2018, 8:14am UTC](https://discourse.mozilla.org/t/add-on-is-incompatible-with-firefox-58-0-1-the-latest-release-of-firefox/25100/4 "2018-02-04T08:14:12Z")

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Since Firefox 57 only web-extensions are allowed, see the comparison here:

> **[Develop](https://extensionworkshop.com/documentation/develop/)**
>
> Get help creating & publishing Firefox extensions.