Release: Thunderbird Beta 19.0b1

Author: thunderbird-botmobile[bot]

app-metadata/net.thunderbird.android.beta/en-US/changelogs/50.txt

@@ -0,0 +1,9 @@
+Thunderbird version 19.0b1
+
+New:
+- Message notification actions can be configured
+- Message font size scales with device preferences
+
+Fixed:
+- Thunderbird crashed on Android 8 when fetching images
+- Accidental swipe in message viewer marked unread email as read

app-thunderbird/build.gradle.kts

@@ -14,7 +14,7 @@ android {
         applicationId = "net.thunderbird.android"
         testApplicationId = "net.thunderbird.android.tests"
 
-        versionCode = 49
+        versionCode = 50
         versionName = "19.0"
 
         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 +1,12 @@
 <?xml version="1.0" encoding="utf-8"?>
 <?xml-stylesheet type="text/xsl" href="changelog_style.xsl"?>
 <changelog>
+    <release version="19.0b1" versioncode="50" date="2026-04-14">
+        <change>New: Message notification actions can be configured</change>
+        <change>New: Message font size scales with device preferences</change>
+        <change>Fixed: Thunderbird crashed on Android 8 when fetching images</change>
+        <change>Fixed: Accidental swipe in message viewer marked unread email as read</change>
+    </release>
     <release version="18.0b4" versioncode="49" date="2026-04-06">
         <change>Fixed: Deleted messages could remain visible in message list</change>
     </release>