> For the complete documentation index, see [llms.txt](https://developer.thunderbird.net/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://developer.thunderbird.net/add-ons/updating.md).

# Add-on Update Guides

- [Updates for Thunderbird 140](https://developer.thunderbird.net/add-ons/updating/updates-for-thunderbird-140.md)
- [Update for Thunderbird 128](https://developer.thunderbird.net/add-ons/updating/tb128.md): Required steps to update add-ons for Thunderbird 128.
- [Update for Thunderbird 115](https://developer.thunderbird.net/add-ons/updating/tb115.md): Required steps to update add-ons for Thunderbird 115.
- [Adapt to Changes in Thunderbird 103-115](https://developer.thunderbird.net/add-ons/updating/tb115/adapt-to-changes-in-thunderbird-103-115.md)
- [Update for Thunderbird 102](https://developer.thunderbird.net/add-ons/updating/tb102.md): Required steps to update add-ons for Thunderbird 102.
- [Adapt to Changes in Thunderbird 92-102](https://developer.thunderbird.net/add-ons/updating/tb102/adapt-to-changes-in-thunderbird-92-102.md)
- [Update for Thunderbird 91](https://developer.thunderbird.net/add-ons/updating/tb91.md): Required steps to update add-ons for Thunderbird 91.
- [Adapt to Changes in Thunderbird 79-91](https://developer.thunderbird.net/add-ons/updating/tb91/changes.md)
- [Update for Thunderbird 78](https://developer.thunderbird.net/add-ons/updating/tb78.md): Required steps to update add-ons for Thunderbird 78.
- [Adapt to Changes in Thunderbird 69-78](https://developer.thunderbird.net/add-ons/updating/tb78/changes.md)
- [Update for Thunderbird 68](https://developer.thunderbird.net/add-ons/updating/tb68.md): Required steps to update add-ons for Thunderbird 68.
- [Adapt to Changes in Thunderbird 61-68](https://developer.thunderbird.net/add-ons/updating/tb68/changes.md)
- [How to convert legacy extensions?](https://developer.thunderbird.net/add-ons/updating/historical-overview.md)
- [Convert wrapped WebExtensions to modern WebExtensions](https://developer.thunderbird.net/add-ons/updating/historical-overview/wrapped-to-modern.md)
- [Convert legacy WebExtensions to modern WebExtensions](https://developer.thunderbird.net/add-ons/updating/historical-overview/legacy-to-modern.md)
- [Convert legacy overlay extension to legacy WebExtension](https://developer.thunderbird.net/add-ons/updating/historical-overview/overlays.md)
- [Convert legacy bootstrapped extension to legacy WebExtension](https://developer.thunderbird.net/add-ons/updating/historical-overview/bootstrapped.md)