# Firefox 155.0

- Product: Firefox (https://whatsnew.fyi/product/firefox)
- Vendor: Mozilla
- Date: 2026-09-04
- Version: 155.0
- Original notes: https://play.google.com/store/apps/details?id=org.mozilla.firefox&hl=en&gl=US
- Permalink: https://whatsnew.fyi/product/firefox/releases/155.0-a3fb4625
- Labels: Platforms: Android

What's New is an index, not a publisher: every entry below links to the vendor's own release notes, which are the authoritative source. Entries are labelled where they are hand-curated sample data, pre-releases, or drawn from a secondary source such as a developer blog.

Reuse: the summaries, labels and curation here are © What's New. Quote freely with attribution and a link back; wholesale republication of the corpus is not permitted — terms: https://whatsnew.fyi/terms. The vendors' own release notes remain their publishers'.

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- **added** — Long-press a shortcut on the toolbar to edit its setting directly
- **changed** — Tab groups can be ungrouped and shared more easily
- **changed** — Adjust shake sensitivity for easier access to page summaries
- **added** — Translations now support Marathi and Urdu
- **changed** — Autofill prompts now automatically close when you move away from a field
- **fixed** — Tabs opened by extensions while in private browsing now load privately, preventing site data from being left behind in regular browsing

* Toolbar shortcuts: Long-press a shortcut to edit its setting directly.
* Tab groups: Ungroup and share them more easily.
* Shake to summarize: Adjust shake sensitivity for easier access to page summaries.
* Translations: Now supports Marathi and Urdu.
* Autofill prompts: Now automatically close when you move away from a field.
* Private extension tabs: Tabs opened by extensions while in private browsing now load privately, preventing site data from being left behind in regular browsing.