Release: Thunderbird Beta 18.0b1

Author: thunderbird-botmobile[bot]

app-metadata/net.thunderbird.android.beta/en-US/changelogs/46.txt

@@ -0,0 +1,16 @@
+Thunderbird version 18.0b1
+
+New:
+- PNG avatars
+- Setting to display ISO date/time in message list
+- Fixed-width font for composing
+
+Changed:
+- Attachment summary moved to header for visibility
+
+Fixed:
+- "Delete (from notification)" setting did not retain state
+- Find folder search hint text was cut off
+- User not notified if offline when sending message
+- Warned "Sent folder not found" when uploading sent messages was disabled
+- CC/BCC fields were not expanded by default for Reply All

app-thunderbird/build.gradle.kts

@@ -14,7 +14,7 @@ android {
         applicationId = "net.thunderbird.android"
         testApplicationId = "net.thunderbird.android.tests"
 
-        versionCode = 45
+        versionCode = 46
         versionName = "18.0"
 
         buildConfigField("String", "CLIENT_INFO_APP_NAME", "\"Thunderbird for Android\"")
@@ -110,7 +110,7 @@ android {
             signingConfig = signingConfigs.getByType(SigningType.TB_BETA)
 
             applicationIdSuffix = ".beta"
-            versionNameSuffix = "b0"
+            versionNameSuffix = "b1"
 
             isMinifyEnabled = !isCI
             isShrinkResources = !isCI

app-thunderbird/src/beta/res/raw/changelog_master.xml

@@ -1,6 +1,19 @@
 <?xml version="1.0" encoding="utf-8"?>
 <?xml-stylesheet type="text/xsl" href="changelog_style.xsl"?>
 <changelog>
+    <release version="18.0b1" versioncode="46" date="2026-03-16">
+        <change>New: Add support for PNG avatars</change>
+        <change>New: Add setting to display ISO date and time in message list</change>
+        <change>New: Used fixed-width font for composing when user chooses fixed-width for viewing</change>
+        <change>Changed: Attachment summary moved from message bottom to header for visibility</change>
+        <change>Fixed: EHLO parsing exception appeared in logcat when sending email</change>
+        <change>Fixed: &#34;Delete (from notification)&#34; setting did not retain state</change>
+        <change>Fixed: Find folder search hint text was cut off on smaller screens</change>
+        <change>Fixed: User was not notified if they were offline when sending message</change>
+        <change>Fixed: Warned &#34;Sent folder not found&#34; when uploading sent messages was disabled</change>
+        <change>Fixed: Loading bar appeared detached from header, leaving visible gap</change>
+        <change>Fixed: CC/BCC fields were not expanded by default for Reply All</change>
+    </release>
     <release version="17.0b4" versioncode="45" date="2026-02-24">
         <change>Fixed: Application navigation and account switching could crash</change>
     </release>