TB 17 Content Plan

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#146 opened on Jan 21, 2026 1 comment 0 reactions 1 assignee View on GitHub

@rtanglao is already working on this.

Since Jan 21, 2026.

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Description

Android M: Knowledge: Android

my understanding (source. of truth is not in this repo :-) ): Release date: Tentatively March 16, 2026 (formerly March 2, 2026): in order to give time for the following to soak on an extra beta (from matrix):The fix is revert any chance related to the new Message List State that affected the Legacy Message list and then duplicate the code of the Legacy Message list into a new file and then applying the new state changes there <-- Fix Pull Request 10559, Fix issue: [ML 0.5/MVI.01.3] - Separate LegacyMessageListFragment and MessageListFragment implementation #10558

Checklist of possible things to document

Leftover stuff from thunderbird/knowledgebase-issues#150
from Rafael in #Thunderbird Mobile Development: Crash that will be fixed in 17.1 hopefully: (reliably) crashes on Android 8 when fetching images #10721. See 10760

for a followup issue regarding the tall html email truncation problem:

Context:

When dealing with very tall messages, such as newsletters, the WebView cannot render them completely because they exceed the maximum size that the GPU can handle for a texture.

This was the primary reason the app was crashing. With recent changes to the WebView, we forced it to utilize the GPU layer for rendering. However, since it exceeded the maximum size on devices running API levels below 29, this would trigger a fatal crash.

Although the app no longer crashes, the WebView still cannot render the entire content, resulting in a truncated message. Users can still access all the messages, as long as they avoid using the "show all images" feature.

The goal of this issue is to investigate ways to resolve the truncation problem.

Email Account custom Avatars (if feature flag turned on), see Account Avatar Customization #10210 - revision 325042 with custom avatars
2026-02-04 moved to TB17 from thunderbird/knowledgebase-issues#150, still under feature flag in 16 ; moved from thunderbird/knowledgebase-issues#151, TB 15, If beta testing is successful and feature flag is enabled on TB 15 release THEN --> Document that multiple indented threads (3 or 4 deep) result in single character lines of text. See comment below. Perhaps related to Bad column rendering in mails #9455 and also perhaps Wrap long lines when displaying message (text size gets too small) #3172 which was discovered in thunderbird/knowledgebase-issues#161 <-- fixed in TB15 beta under a feature flag . I believe still not in TB 15 release, move to 16

References

TB17 release notes on github, soon to be beta 1: https://github.com/thunderbird/thunderbird-android/releases/tag/THUNDERBIRD_17_0b1
Public Google Doc Thunderbird for Android/Mobile Team Blog Notes - Running Log

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