npm / addons-linter

addons-linter

What changed in addons-linter 9 to 10, from its official release notes, upgrade guides and advisories. Sources checked 2026-10-20.

4 breaking2 behavior and defaults4 tooling4 fixes and other

See which of these apply to your code, ranked, in your agent:

npx @unstale/cli init

addons-linter 1013 changes

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10.14.0release notes
Additional validation applies to static themes CSS gradients properties, affecting which themes pass linting.
10.8.0release notes
Node 22 is now used by default.
10.0.0release notes
The obsolete openDialog rules have been removed.
10.0.0release notes

Imports API JSONSchema data from Gecko 154.0b4, which can affect validation of WebExtensions APIs.
10.10.0release notes

Imported Firefox 158 schema data, allowing addons-linter to recognize its schema.
10.14.0release notes
Imported schema data for Firefox 155, 156, and 157, adding support for these Firefox versions in addons-linter.
10.12.0release notes
Schema data for Firefox 153.0b2 is imported, updating the browser data available to addons-linter.
10.8.0release notes
Adds Firefox 149 schema data, allowing addons-linter to use that data when linting.
10.1.0release notes

Usage of userScripts.onBeforeScript in MV2 no longer triggers a warning.
10.14.0release notes
Fixed support for using update_url with enterprise add-ons.
10.11.0release notes
Replacement values in l10n strings are no longer re-scanned.
10.9.0release notes
Allows a placeholder to be replaced more than once in an l10n string.
10.8.1release notes