Bug 2036647 support for CSS gradients in additional_backgrounds and theme_frame#29910
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rebloor merged 1 commit intoJul 2, 2026
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rpl
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Jun 30, 2026
| "firefox": { | ||
| "version_added": "55" | ||
| "version_added": "55", | ||
| "notes": "CSS gradients are supported from Firefox 153." |
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Nit: how about slightly tweak the wording as something like Support for CSS gradients was introduced in Firefox 153.?
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@rpl Most, if not all, of our similar notes use the present tense, e.g., "Available for use in Manifest V3 from Firefox 138." Generally, in technical content, the present tense is considered clearer.
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Summary
Addresses the dev-docs-needed requirements of Bug 2036647 "Allow extension themes to use CSS gradients" with:
additional_backgroundsandtheme_frameadditional_backgrounds_sizepropertyRelated issues
Related MDN content changes made in mdn/content#44551