EarlgreyTea です。

[quote="atsu73"]本日、Ubuntuの「ソフトウェアの更新」にてv115.3.1(64-bit)にアップデートしましたが、
アップデート後、メールタブ内に何も表示されない状態になっております。[/quote][quote="atsu73"]エラーコンソールでは、以下のようなエラーが表示されております。[/quote]
[code]Uncaught TypeError: webBrowser is undefined
<anonymous> chrome://messenger/content/about3Pane.js:6948
isCommandEnabled chrome://messenger/content/mailCommon.js:438
isCommandEnabled chrome://messenger/content/mailTabs.js:297
isCommandEnabled chrome://messenger/content/tabmail.js:549
getEnabledControllerForCommand chrome://messenger/content/globalOverlay.js:61
goUpdateCommand chrome://messenger/content/globalOverlay.js:79
_stopMeteors chrome://messenger/content/mailWindow.js:517
_stopTimeoutID chrome://messenger/content/mailWindow.js:541
about3Pane.js:6948:9
An error occurred updating the cmd_stop command: [Exception... "[JavaScript Error: "webBrowser is undefined" {file: "chrome://messenger/content/about3Pane.js" line: 6948}]'[JavaScript Error: "webBrowser is undefined" {file: "chrome://messenger/content/about3Pane.js" line: 6948}]' when calling method: [nsIController::isCommandEnabled]" nsresult: "0x80570021 (NS_ERROR_XPC_JAVASCRIPT_ERROR_WITH_DETAILS)" location: "JS frame :: chrome://messenger/content/globalOverlay.js :: getEnabledControllerForCommand :: line 61" data: yes] globalOverlay.js:81:13[/code]この部分の状況により、メールホームタブのブラウザーがまるっと死んでしまったという感じでしょう。

アップーデートによる不整合か、Ubuntu版が何か壊れているのか、atsu73 さんの Ubuntu環境の問題なのかはこちらではわかりません。

とりあえず、[url=https://support.mozilla.org/ja/kb/installing-thunderbird-linux#w_shou-dong-deinsutorusuru-shang-ji-yuzaxiang-ke]Thunderbird を Linux にインストールする | Thunderbird ヘルプ[/url] の「手動でインストールする (上級ユーザー向け)」を参考に、公式のバイナリをインストールして動作確認してみてください。

【追記】
そういえば、「[url=https://forums.mozillazine.jp/viewtopic.php?f=3&t=20451]102.2.2にアップデート後、メッセージフィルタが機能しなくなりました[/url]」ってどうなったのでしょう。

本日、Ubuntuの「ソフトウェアの更新」にてv115.3.1(64-bit)にアップデートしましたが、
アップデート後、メールタブ内に何も表示されない状態になっております。

[img]tb.png[/img]

アップデート前のバージョンは確認できていないのですが、UI維新前のバージョンかと
思われます。

考えられる問題の状況や、解決策などご教授いただけますでしょうか。

以下、現在確認できる情報を列記いたしました。
ご参考になれば幸いです。

コマンドラインで起動した際には、以下のように表示されます。

[code]
$ thunderbird
[ImapModuleLoader] Using nsImapService.cpp
console.error: "Assert failed: Calendar manager initialised calendars before loadCalendarComponent ran on the first 3pane window. This should not happen.\n "
JavaScript error: chrome://messenger/content/about3Pane.js, line 3914: NS_ERROR_FAILURE: Component returned failure code: 0x80004005 (NS_ERROR_FAILURE) [nsIMsgFolder.server]
console.debug: "Found 0 public keys and 0 secret keys (0 protected, 0 unprotected)"
console.warn: services.settings: Failed to load last_modified.json: TypeError: NetworkError when attempting to fetch resource.
console.debug: "Successfully loaded optional OpenPGP library libgpgme.so.11 from system's standard library locations"
console.debug: "gpgme version: 1.16.0"
JavaScript error: chrome://messenger/content/mailTabs.js, line 100: TypeError: win.messageBrowser is undefined
console.error: mailnews.pop3.1: "SecurityError: a SecurityProtocol error occurred"
JavaScript error: chrome://messenger/content/about3Pane.js, line 6948: TypeError: webBrowser is undefined
console.error: "An error occurred updating the cmd_stop command: [Exception... \"[JavaScript Error: \"webBrowser is undefined\" {file: \"chrome://messenger/content/about3Pane.js\" line: 6948}]'[JavaScript Error: \"webBrowser is undefined\" {file: \"chrome://messenger/content/about3Pane.js\" line: 6948}]' when calling method: [nsIController::isCommandEnabled]\" nsresult: \"0x80570021 (NS_ERROR_XPC_JAVASCRIPT_ERROR_WITH_DETAILS)\" location: \"JS frame :: chrome://messenger/content/globalOverlay.js :: getEnabledControllerForCommand :: line 61\" data: yes]"
[/code]

Troubleshoot Modeで再起動した際の表示は、以下の通りで、
メールタブに何も表示されないのは同様です。

[code]
$ [ImapModuleLoader] Using nsImapService.cpp
console.warn: services.settings: Failed to load last_modified.json: TypeError: NetworkError when attempting to fetch resource.
JavaScript error: chrome://messenger/content/about3Pane.js, line 3914: NS_ERROR_FAILURE: Component returned failure code: 0x80004005 (NS_ERROR_FAILURE) [nsIMsgFolder.server]
console.debug: "Found 0 public keys and 0 secret keys (0 protected, 0 unprotected)"
console.debug: "Successfully loaded optional OpenPGP library libgpgme.so.11 from system's standard library locations"
console.debug: "gpgme version: 1.16.0"
console.error: mailnews.pop3.1: "SecurityError: a SecurityProtocol error occurred"
JavaScript error: chrome://messenger/content/mailTabs.js, line 100: TypeError: win.messageBrowser is undefined
JavaScript error: chrome://messenger/content/about3Pane.js, line 6948: TypeError: webBrowser is undefined
console.error: "An error occurred updating the cmd_stop command: [Exception... \"[JavaScript Error: \"webBrowser is undefined\" {file: \"chrome://messenger/content/about3Pane.js\" line: 6948}]'[JavaScript Error: \"webBrowser is undefined\" {file: \"chrome://messenger/content/about3Pane.js\" line: 6948}]' when calling method: [nsIController::isCommandEnabled]\" nsresult: \"0x80570021 (NS_ERROR_XPC_JAVASCRIPT_ERROR_WITH_DETAILS)\" location: \"JS frame :: chrome://messenger/content/globalOverlay.js :: getEnabledControllerForCommand :: line 61\" data: yes]"
[/code]

エラーコンソールでは、以下のようなエラーが表示されております。

[code]
1696399870880 addons.xpi WARN Checking /usr/lib/thunderbird/distribution/extensions for addons
Assert failed: Calendar manager initialised calendars before loadCalendarComponent ran on the first 3pane window. This should not happen.
calUtils.jsm:127:15
ASSERT resource:///modules/calendar/calUtils.jsm:127
loadCalendarComponent chrome://calendar/content/calendar-chrome-startup.js:39
_loadComponentsAtStartup chrome://messenger/content/messenger.js:394
_delayedStartup chrome://messenger/content/messenger.js:384
Uncaught (in promise) NS_ERROR_FAILURE: Component returned failure code: 0x80004005 (NS_ERROR_FAILURE) [nsIMsgFolder.server]
setFolderPropertiesFromFolder chrome://messenger/content/about3Pane.js:3914
setServer chrome://messenger/content/about3Pane.js:3820
_createServerRow chrome://messenger/content/about3Pane.js:1998
initServer chrome://messenger/content/about3Pane.js:723
_initMode chrome://messenger/content/about3Pane.js:1984
_toggleMode chrome://messenger/content/about3Pane.js:1941
set activeModes chrome://messenger/content/about3Pane.js:1844
init chrome://messenger/content/about3Pane.js:1503
about3Pane.js:3914
Found 0 public keys and 0 secret keys (0 protected, 0 unprotected) RNPLib.jsm:551:15
services.settings: Failed to load last_modified.json: TypeError: NetworkError when attempting to fetch resource. Utils.sys.mjs:322
Successfully loaded optional OpenPGP library libgpgme.so.11 from system's standard library locations GPGMELib.jsm:64:13
gpgme version: 1.16.0 GPGMELib.jsm:236:15
Uncaught TypeError: win.messageBrowser is undefined
openTab chrome://messenger/content/mailTabs.js:100
_cloneTemplate chrome://messenger/content/mailTabs.js:66
mailTabs.js:100:13
1696399871816 addons.xpi WARN Addon with ID thunderbird-compact-light@mozilla.org already installed, older version will be disabled
1696399871816 addons.xpi WARN Addon with ID thunderbird-compact-dark@mozilla.org already installed, older version will be disabled
mailnews.pop3.1: SecurityError: a SecurityProtocol error occurred Pop3Client.jsm:369:18
Uncaught TypeError: webBrowser is undefined
<anonymous> chrome://messenger/content/about3Pane.js:6948
isCommandEnabled chrome://messenger/content/mailCommon.js:438
isCommandEnabled chrome://messenger/content/mailTabs.js:297
isCommandEnabled chrome://messenger/content/tabmail.js:549
getEnabledControllerForCommand chrome://messenger/content/globalOverlay.js:61
goUpdateCommand chrome://messenger/content/globalOverlay.js:79
_stopMeteors chrome://messenger/content/mailWindow.js:517
_stopTimeoutID chrome://messenger/content/mailWindow.js:541
about3Pane.js:6948:9
An error occurred updating the cmd_stop command: [Exception... "[JavaScript Error: "webBrowser is undefined" {file: "chrome://messenger/content/about3Pane.js" line: 6948}]'[JavaScript Error: "webBrowser is undefined" {file: "chrome://messenger/content/about3Pane.js" line: 6948}]' when calling method: [nsIController::isCommandEnabled]" nsresult: "0x80570021 (NS_ERROR_XPC_JAVASCRIPT_ERROR_WITH_DETAILS)" location: "JS frame :: chrome://messenger/content/globalOverlay.js :: getEnabledControllerForCommand :: line 61" data: yes] globalOverlay.js:81:13
[/code]